i have played video games since i was 5 here's the lowdown
PS2: a bunch good games and a good price(150$) good games are grand theft auto 3,4,5/ grand turismo 4,5/ god of war/ratchet and clank 1,2,3/ jack and daxer 1,2,3 and devil my cry 1,2,3
xbox: if you like power and a great on-line play xbox is for you. great games include halo,halo 2/ star wars knights of the old republic/ ninja gaiden
gamecube: the most economically friendly and has the best "playing games" great games include: Mario sunsine/ Mario tennis/ Zelda the wind waker/ resident evil 4/ paper Mario the thousand year door/metoid prime 1,2/ animal crossing/ pikmin 1,2/
the GBA is the portable that sells better then everything Else: Mario and Luigi superstar saga/ wario ware/ advance wars 1,2/ Astro Boy: Omega Factor/The Legend of Zelda: The Minish Cap
and that's that...