i owned all 3, and from what i got, xbox, i played for football, and first person shooters, seemed to be what they geared for, or what i got out of it. ps2, i really only played for the rpg's which made up 75% of my games. cube i got for, basically, mario, zelda, animal crossing. i got for my old favs, and some of the newer, different games i saw.
i found the xbox controller a pain, didn't like it much at all, ps2's was familiar, and easiest at first, while, wierd, cubes controller i liked the best.
i think ps2 had the best games, and had me coming back with the ff's, and others in that genre, nintendo had me back with updates and innovations to older characters. and xbox, i really only had to play the sports games, madden mostly, because well, all my pals had madden on xbox, i got xbox last, cheaper, and mostly for convenience for my friends.

i think ps2 had the games to come back for more, cube had the new spins on favs, and new games with an odd twist to the gameplay that had me buy on. xbox was just, where my game choice, and gameplay sat, was suckin that hind teet the whole way.