God, if you have a PC you MUST GET BALDUR'S GATE I AND II!
Those games blend RPG, Strategy, and Horror into a interesting battle system, story and characters of FF quality, truly amazing style, and a nice, dark, scary, and emotional style.

Ah, speaking of which, Dark Cloud and Drak Chronicle/Dark Cloud 2 are great games.

The Tales Of....(insert something) games can be found on PS2.

.hack is a great RPG that thinks its an MMO.

Finally, a damn fine game for PS1 is of couse, Final Fantasy Tactics. Wow, am I the only person to mention it? It's too hard though, but enjoyable any day.