Ah, the true meaning of life, discussing favorite old video games.
Well, NES would have Final Fantasy, Crystalis, both of the Zelda games, Castlevania II, Battle of Olympus, Metal Gear, Metal Gear: Snake's Revenge, Golgo 13, Bionic Commando, and all 3 Super Mario Bros
SNES would be Illusion of Gaia, Zelda: Link to the Past, Breath of Fire, Drakhen, Super Mario World, Secret of Evermore, Secret of Mana, Super Castlevania IV, and Super Mario RPG. I would have noted both Final Fantasy and Chrono Trigger, but didn't get to play them as of yet. I know, what a shame.
Playstation would be both Lunar games, Alundra, Final Fantasy VII (with some reservations), Xengears (my all time favorite), Metal Gear Solid, all the Resident Evils (okay, not entirely role play, but in a ways it is), Wild Arms, and Guardian Crusade (hey, it had a pig in your party).
And PS2 would be Final Fantasy X and X-2, although I haven't played much beyond that.