There aren't really that many that stand out, but...

3. Metal Gear Solid 2: Sons of Liberty (PS2)
2. Fable (XBOX)
1. METAL GEAR SOLID TACTICAL ESPIONAGE (PS)

10
 

1. Okage the shadow king
2. Kingdom Hearts
3. Final Fantasy 7
4. Phantom Brave
5. Final Fantasy X
6. Final Fantasy 8
9. Legend of Zelda
10. Okami

10. Legend of Zelda (any of them)
9. Star Ocean: Till the End of Time
8. Final Fantasy VII
7. Xenosaga (all of them)
6. Final Fantasy VIII
5. Final Fantasy XII
4. Final Fantasy X
3. Final Fantasy IX
2. Kingdom Hearts
1. Kingdom Hearts II

Square Enix is the best! ^_^

1. Final Fantasy VII
2. Final Fantasy X
3. Final Fantasy XII
4. God of War
5. God of War II
6. Need for Speed: Most Wanted
7. Guitar Hero
8. Dance Dance Revoulation
9. Kindom Hearts II
10. Legend of Zelda (any)

1 Nursery rhyme(hentai sim)
2 final fantasy X
3 final fantasy X-2
4 FInal fantasy XII
5 Final fantasy Ix
6 final fantasy VIII
7 FInal fantasy VII
8 Dark cloud 2
9 tales of symphonia
10 resident evil 4

Well, it changes regularly but currently:

1.Under the Knife(DS)
2.Tekken 4(PS2)
3.FFVII Dirge of Cerberus(PS2)
4.Tekken Tag Tournament(PS2)
5.Zelda, a Link in Time
6. It's all old-school NES from here on out:P

I'm not much of a gamer. So I don't have 10 comes I'm obsessed with right now.
Buttttt
Mortal Kombat
Sims 2
Ragnarok
Trickster Online
Those are the most current.

1-Shadow of the Colossus (i crave boss battles)
2-Kingdom Under Fire (i crave half-naked elves)
3-Flyff-PC- (i crave mmorpgs)
4-everything Halo (i crave xbox live, too)

thats all the games that I really have time to play

10. pokemon blue
9. pokemon diamond
8. super mario land 2: six golden coins
7. wwf no mercy
6. pokemon stadium
5. fifa 06
4. call of duty 4
3. final fantasy vii
2. tetris
1. final fantasy x

1) Winning eleven PS2 (with friends).
2) Counter Strike source (with friends).
3) Pokemon (all GBA series).
4) Golden axe (an old game).
5) Prince 1 & 2 (the old ones, those DOS games).
6) Supaplex (an old game).
7) Red Alert 2 (with friends).
8) Rollar coaster Tycoon.
9) Call of Duty 4 (with friends).
10) Resident evil (all PS and PS2 series).

maybe I messed some of my favourites but I don't play much these days.