Jedi Power Battles (Mace): A classic Star Wars cames, but the force powers seem to get over powering with some (*cough*Mace*cough*). Fun to play Vs. with other and a great replay value. Too bad that the Dreamcast died.
Gamecube
Super Smash Bros. Melee (Everything): I love it more than the 64. All characters, all stages, all events, and all trophies. Luckily the higher level computer settings in this game still prove to be a challenge time to time. Also a lot of obscure characters in this game. The Game and Watch will definatly bring back a few memories, and the Fire Emblem characters were a clear plug in the hopes of raising the market for them.
Prince of Persia II Warrior Within: I played through this game... fun puzzles to figure out. The battles required tactics and were fun to play. But the game has a hell of a lot of bugs, particularly the once that kept me from beating the game the first time, and right near the end, too. Man I was pissed, but gave up soon after. Another friend of mine from class had the game and had beaten it, and let me take off from his safe file, with didn't result in the bug. Besides the bugs, this game is awesome. Fun to hack and slash, explore, or whatever. Except the map is worthless as well, I could never navigate where I had to go with it.