Dude, how the hell do you think that huge ass list will help?
Well, I could certainly remark some of that list
PSX:
-MGS (hell, I'll repeat it, that game is something that everyone who considers him/herself as a gamer, MUST have, or at least play nad beat)
-All the RE's for PSX, definitely.
-Soul Reaver is an awsome game, unfortunately, it leaves you with a HUGE cliffhanger at the end and it's sequel (for PS2)sucks like hell.
-I'd say get ALL 3 Syphon Filter games.
-ALL the FF available for PSX.
-Tekken 3
-SF Alpha 3
-The Two Dino Crisis games.
-The Two Fear Effect games (man, this games are outstanding, trust me, OUTSTANDING!!! some of my favorite PSX games ever)
-And Parasite Eve I and II. Real nice games.
Those I just would not recommend, but consider as Must Have. This is the opinion, though, of a gamer who likes RPG's, action and adventure, and figting games over all. That's why you see I did not recommend a single racing or sports game. But wait... there's CTR!!! (Crash Team Racing) (and it was in MAkag's list :B) I really had lots of fun with that game.
Now I feel lazy for the PS2 games