Final Fantasy VII, VIII, IX - The seventh was my first Final Fantasy, and probably the reason I got seriously hooked on videogames. FFVIII had some wonderful moments, and FFIX is a little jewel.
Metal Gear Solid - I thought I would hate it; I was so wrong. Kojima, you cunning demon.
Pandemonium - My first game for the PS1! Pure platforming fun.
Dead or Alive - Because I couldn't stand Tekken (I still really don't know why), and because it was fast and had COSTUMES XD
Spyro the Dragon - Wow, it was mentioned a lot! I used to play it with my brother for whole afternoons... good times. Such an adorable, imaginative and funny platformer.