X-Box - Microsoft says "its best because its most powerful"
No games for it I really want. Plus its expensive.
Gamecube - I think its only slightly less powerful than X-Box, and I've liked Nintendo for a long time, and I like a lot of their games. I have a Gamecube and SSB:M, the Star Wars game, and Pikmin - - - and I like all three of those games a lot.
Plus there's Gameboy Advance (with Mario Kart Advance, Golden Sun, Advance Wars, the original SMW, and a Sonic the Hedgehog game! wow! btw I have all those too)
There's the PC, which you can do much more on than just games :-p but you can do games too.
And then there's PS2, which has slightly inferior graphics b/c its a year older than the other two leading consoles, but I *MIGHT* get one if only for the FF games, if FFXI and FFXII turn out to be any good. But I *WON'T* buy one for $300.