F-Zero was cool, but I hated the fact that it was only one-player. Top Gear 3000 was the greatest racing game on the SNES. Breath of Fire II was awesome, and both Lufias mopped the floor. Peacekeepers is a great party/friends game. (It sucks one-player.) Killer Instinct was cool when it first came out, but Mortal Kombat 2 was the best fighting game... Super Metroid was great, but it had little replay value (other than seeing how fast you could beat it).
Best SNES game? Either Lufa II or The Legend of Zelda: A Link to the Past.
(And don't forget Super Mario World...)