As stated before, there's so many to choose!
Mega Man X4
Breath of Fire 3
Just to name a few
redwildllama: Oh yeah the opening to Wild Arms is incredible, I must have watched it 10 times already and I've never played the game yet ^^'
And it's as people say, it's hard to pick just one title. My favorite is definitively Metal Gear Solid but I also love Legend of Dragoon, Final Fantasy VII, Crash Bash, Spyro 2, Medievil (I actually played the remake on psp), Crash Team Racing, Resident Evil 1 and 2, Parasite Eve, etc.
Frogger and Crash Bandicoot 2. I think I also still have a copy of Scooby doo and the Cyber chase floating around here somewhere....
I remember playing a lot of the final fantasy games on ps1 and loving them the most. I had so many other games though I can't even remember most of them, that was a long time ago.
Mine would have to be Spyro The Dragon.
Final Fantasy 9.
Tomb Raider II
Those are some of my PS1 favorites.
Eretzvaju (Evil Zone)
Bloody Roar, Bloody Roar 2
Gran Turismo 2 <3 Moon Over The Castle OST
Ehrgeiz - God Bless The Ring (A New Quest - Forsaken Dungeon)
Legacy Of Kain - Soul Reaver
Tekken 2 with its awesome stages and OST
Spyro Year Of The Dragon- An extrodinarily high peak in the platform genre.