Every system has their own strenghths and weaknesses.
PS2 is good, it has more games by sheer volume, but has the weakest hardware, and a half-ass online strategy. So-So controller. Katamari Damacy
GameCube is good, has many good games, but the total are few in number, library is lacking. Horrible Controller, Lacks online play altogether. Super Smash Prothers Melee
Xbox is good, limited selection, but a few gems, strongest hardware, Solid and perfect online play. great contoller. Halo and Halo 2
remember, this is all my person opinion.
I love all three systems, but none are perfect, so I prefer to not gloss over the flaws of one, and tear open the flaws of another.
And for the record, I love the large Xbox Controller, it fits my hands like a glove. And my subsription to Xbox Live is well worth it.