My favorites growing up were all on Nintendo:

Rygar
Mike Tyson's Punchout
Dragon Warrior

I didn't grow up with a tv, so my video game experience mostly consisted of watching my more advanced friends play. I did however, beat Rygar numerous times. I love the music on that game.

Other favorites were:

Kid Icarus
Gauntlet
Mario Bros 1-3
Teenage Mutant Ninja Turtles
Icari Warriors (I think that's what it was called.)
Contra
Double Dragon
The Simpsons
Marble Madness
Rampage

a quick top 10:

10. Pikmin
9. Super mario bros. 3
8. Tales of Symphonia
7. The Legend of the dragoon
6. Skys of Arcadia Legends
5. Baten Kaitos
4. Donkey Kong Country 2
3. Chrono Cross
2. Final Fantasy Tactics (this game is awesome....and hard...and long.....)
1. Zelda - A link to the past (this game is better than perfect)

mentions to: Animal crossing, Golden Sun: The Lost Age, Super Mario Kart and Yoshi's island (snes version)

the whole series
zelda
mario
metroid
most all final fantasy
metal gear solid
rpgs
chrono trigger
earthbound
mario rpg
1st 2 suikedens
xenogears
parisite eve
1st two lufias
skies of arcadia
old school classics
megaman 1-3 and x1-x3
sonic1-3 and cd
contra1-3
kid icarus
bionic commando
mike tysons punchout and super punchout
ghousts and goblins and sequils
gradius series
rygar
theres more but thats enough for now
current gen
god of war
fable
resident evil 4
devil may cry 1and3
ninja gaiden
rachet and clank especially up your arsenal but theyre all good

I do have a lot of fave games, but what I liked most are Mario Kart, FF VII and GTA VC and SA.

20 games that I particularly love, in no particular order:

1. Metroid Prime.
2. Resident Evil remake and RE4 (though the latter's violence is disturbing, the sheer quality of the production/graphics and level progression is superb).
3. The Legend of Zelda- The Wind Waker.
4. Curse of Monkey Island.
5. Lemmings.
6. Cannon Fodder.
7. Superfrog.
8. Pinball Dreams/Pinball Fantasies/Pinball Illusions.
9. 1080 Avalanche.
10. Paper mario: The Thousand Year Door.
11. Outrun 2.
12. Alone in the dark: the new nightmare.
13. Quake 3.
14. Crash Team Racing (PS1)
15. Creatures (on the Commodore 64, with Clive Radcliffe who had to rescue animals, including from the 'torture chambers'- I bet not many people remember this game).
16. Conker's Bad Fur Day.
17. Beyond good and evil.
18. Jet Set Radio Future.
19. Rick Dangerous 2.
20. Donkey Kong Country.

There are also quite a few Megadrive platform games I love, particularly the Disney one. Super Mario World is a good game with great design but I have enjoyed other games even more.

Metal Gear Solid/Metal Gear Solid 2
Halo/Halo 2
Marble Madness
Soul Calibur
Legend Of Zelda
Arkanoid
Fable
R-Type
Super Mario Bros. 2
Rez
Power Stone 2
Fuzion Frenzy (Party fun...haha)
Jade Empire
Teenage Mutant Ninja Turtles
NBA Jam
Legacy Of Kain: Soul Reaver
Dino Crisis/Dino Crisis 2
Syphon Filter
Bubble Bobble

Chrono Trigger (Super Nintendo/PlayStation 1)
Super Mario Bros. 3 (Nintendo)
Final Fantasy 3 (Nintendo)
Street Fighter 2 (Nintendo)
X-Men: Children Of The Atom (the arcade fighting game)
Sim Ant
Sim City
Starcraft
Grand Theft Auto Series
Gran Turismo Series
Soul Calibur
Baldur's Gate: Dark Alliance I (PlayStation 2)
Champions of Norrath (PlayStation 2)

RTCW was a classic in my opinion and I also liked Freelancer, it had a nice storyline.

Im bad I actually lost my place and put a half completed post up further but this is where it should belong so I apologise for that post.

Best games

Atari 2600
- Hero

Hand held
- Donkey Kong (every kid had to have one)

Colecovision
- Turbo

Sega PC (yes there was a Sega PC)
- Congo Bongo

Commodore 64
- Legacy of the Ancients (fave RPG ever never wanted it to end)
- Elite (this should be remade...please please)
- Pirates
- The Bards Tale 1,2 & 3 (hardest dungeons ever designed every square was used 25 x 25 sized dungeons, you couldnt wander aimlessly you had to buy graph paper and map the damn things)
- Ikari Warriors
- International Karate +
- Bubble Bobble

Coin Op
- Star Wars
- Gauntlet (i ruled the local arcade on this game most days playing 12+ hours on one coin. Best result was I reached level 483 with 11,000 health but killed it off cos' it was 11:30pm way past my curfew. I heard there was only 512 levels in all? Anybody know this for cert?)
- Dragons Lair 3D
- Wonder Boy (the most hotly contested game at our pinny parlour. I trailblazed this game for a few months but eventually got pulled in by the people I taught how to play and ended up about 3rd on the list)
- Karate Champ (i used to have a key to this game and racked up creds for mates party vs. action. naughty naughty)
- Rastan Saga
- Rygar

Commodore Amiga
- Stunt Car Racer
- Speedball

Nintendo
- Super Mario Brothers
- Mike Tysons Super Punch Out

SNES
- Uni Rally (played over 12,000 games of this great addictive game. Our whole house and any visitors were addicted. Best party game ever)
- Street Fighter
- Top Gear (best arcade driving game gameplay wise, you could go so fast and stay on track by knowing the course and of course avoiding traffic. By saving ya boosts for the right time it allowed you to catch up, or to be caught. Best 2 player vs. fun to be had in a car game)

PlayStation 1
- Tomb Raider 2 (say no more)
- Resident Evil (made my jaw drop and poop my duds)
- Tekken 3
- Soul Calibur 3
- Final Fantasy VII (at the time there was nothing like it)

PC
- Balders Gate II (Shadows of Amn)

Xbox (in order of best)
- GTA San Andreas
- Half Life 2
- Halo
- KOTOR
- Ninja Gaiden
- Splinter Cell 1,2,3
- Galleon
- Prince of Persia - Sands of Time
- Beyond Good & Evil
- Dai Senrakyu VII
- Fight Night Round 2
- Oddworld Strangers Wrath
- Soul Calibur II

Game that had the biggest effect all time out of those listed above: Legacy of the Ancients closely followed by Resident Evil. Game spent most time playing Uni Rally just ahead of Gauntlet and The Bards Tale.

Mine are:

Kingdom Hearts
Grandia
Grandia2
FF7
FF9
FF3
NBA Street 2
Double Dribble
Taking it 2 the hoop
Star Ocean 2
Chrono Trigger
Soul Calibur
Lunar
Lunar2

Wing Commander
Tie-Fighter
Myth
Myth II
Diablo II
Unreal Tournament 2004
Never Winter Nights
Ghost Recon
Rome TW

my favorite games are:

1.resident evil 4
2.siren
3.resident evil x code:veronica
4.jak x combat racing
5.metal gear solid 3
6.metal gear solid 2
7.metal gear solid
8.constantine
9.twisted metal black
10.devil may cry 2

In no order:

FF7 (my fave.
"Oh but Lordsmoogsbottom, there are so many superior games like Timecross or the Jades of Elmundor series."
(slap) "I dont want to hear it, keep smoking your crack pipe, hippy.")

Halo
Halo 2
Fable
Kingdom Hearts
Frequency
Amplitude
Diablo II
Zelda: Ocarina of Time
Zelda: Majora's Mask
Banjo-Kazooie/Tooie
Prince of Persia 1
K.O.T.O.R.
Conker's Bad Fur Day
Super Smash Bros.

1. Halo: Combat Evolved
2. Half-life 2
3. Tetris
4. Super Mario Bros. 3
5. Metal Gear Solid 3
6. The Elder Scrolls 3: Morrowind
7. Sonic the Hedgehog
8. Metal Gear Solid 2
9. Halo 2
10. Katamari Damacy

Ok, here we go in no particular order:

Lumines (PSP): it's been in my PSP for since before Christmas.
Metal Gear Solid (PS1): I couldn't play this enough.
Metal Gear Solid 3 (PS2): Absolutely amazing!
Zelda: A Link to the Past (SNES): an old school masterpiece.
Gunstar Heroes (Genesis): a very cool platformer with tons of great action and innovation.

some of the best games are

1.megamanbattlenetwork1-6
2.ffx
3.ffx-2

Street Fighter II Turbo (SNES)

My favorite in no particular order although I would probably put FF7 at number 1

Final Fantasy VII
Final Fantasy Tactics
Chrono Trigger
Counter Strike
Legend of Zelda
Super Mario Bros 3
Starcraft
Mike Tysons Punch Out
Halo
NBA Jam TE

Sega Genesis: Sonic 2, Sonic 3, Sonic & Knuckles, Ranger X, and Primal Rage III.

SNES: Super Kirby, Super Smash bros.

PC: F.E.A.R, Quake IV, Iron Storm (if anyone knows what this game is, kudos to ya), FarCry, Brothers in Arms (and Earned in Blood), Total Annihilation, Pariah, Star Wars Battlefront, Call of Duty 1 & 2, and Star Wars Republic Commando

PS3: Killzone 2
Metal Gear Solid 4
Call of Duty World @ War
Uncharted
Resistance 1 & 2
Dark Sector

Mine would be:

1. Betrayal at Krondor - PC
2. Final Fantasy - NES
3. Final Fantasy III (VI) - SNES
4. Legend of Zelda: Ocarina of Time - N64
5. Grand Theft Auto III - PS2
6. Diablo II - PC
7. Super Mario 64 - N64
8. Resident Evil 4 - GC
9. Bionic Commando - NES
10. Final Fantasy X - PS2
11. Doom II - PC
12. Super Mario Bros. 2 - NES
13. Prince of Persia - SNES
14. Grand Theft Auto: Vice City - PS2
15. Warcraft II - PC
16. Tecmo Bowl - NES
17. Star Wars: Knights of the Old Republic - Xbox
18. Ultima Underworld - PC
19. Pitfall - Commodore 64
20. Final Fantasy II (IV) - SNES
21. Super Mario World 2: Yoshis Island - SNES
22. Kings Quest VI - PC
23. Eternal Darkness: Sanity's Requiem - GC
24. Mario Kart 64 - N64
25. Xenosaga Episode I - PS2