I have finally found another one!
Sup.

Madden
Final Fantasy VII
Zelda OOT
Breath of Fire III
Mario 64!

Current games

1. Grand theft Auto Liberty City Stories
2. Assassins Creed 2
3. Little Big Planet
4. Heavy Rain
5. Guitar Hero (I don't like it but everyone else does)

That's a hard one...

1. Final Fantasy VII or VIII (VIII was my first FF game ever, and VII is just really awesome.)
2. Final Fantasy X
3. The Elder Scrolls: Morrowind
4. Kingdom Hearts 2
5. Star Ocean: Till the End of Time

Maybe... Though I'm trying to fit InFamous and Chronicles of Riddick: Assault on Dark Athena in there too.
Also I'm inclined to say Final Fantasy XIII, but since I haven't gotten that far yet...

1. Legend Of Zelda - Ocarina Of Time
2. Bad Fur Day Conker's (actually equal with the first one)
3. Super Mario Sunshine
4. Mario Galaxy
5. Mario Kart - 64

1. Kingdom Hearts II
2. Final Fantasy X
3. Super Smash Bros. Series
4. Mario Kart Wii
5. DDR Series

super mario
pokemon
crash bandicoot...:)

Uhm...

It could be the next list (the order is not important):

1 - Fallout saga (above all Fallout 1 & 2; they were the best Fallout games).
2 - Counter-Strike
3 - Team Fortress 2
4 - Command & Conquer saga (except the last one (Tiberian Twilight), it sucks; EA ruined the saga with that game).
5 - Diablo saga

Im a PC kind of guy so I go for

1. Ragnarok Online
2. Tom Clancey's Rainbow six
3. Call of Duty: Modern Warfare
4. Defense of the Ancients (Warcraft)
5. NBA live 2K10

1.Halo3
2.MW2
3.Boderlands
4.Skate 2
5.Guitar Hero 3

Tetris
Gran Turismo
Ratchet & Clank
Mario Kart
Sims

Legend of Zelda: Ocarina of Time (Twilight Princess is close)
Super Smash Bros (entire series)
Mario Kart DoubleDash
Worms (2 and Armageddon)
Warcraft III

In no particular order: Zork (and IF in general), StarCraft, and NetHack. I can't think of a fourth or fifth besides really obscure works of interactive fiction or StarCraft mods.

1.Resident Evil
2.Call of Duty 5 World at War
3.Pokemon
4.Tetris
5.Pacman