So, you are asking which system has the best games, right?
Okay, well PS2 has a huge fan base with very popular titles at their disposal. I own this one myself.
Gamecube is pretty good, but I don't think I'd ever buy it. It doesn't have enough exclusive games that interest me. Nintendo does have a good name though and have been around forever.
Xbox is by far the best system you can buy. It has the best features out there. Custom game soundtracks, Hard disk, the best DVD player in a system, and the Xbox Live is the easiest way to play online with friends. It even has the voice mic that changes the sound of your voice.
The games are good as well. They have many titles to choose from. And a multiplatform game, such as The Two Towers, is better played on the Xbox. Xbox has the best graphics out of all the systems and loading times are getting faster and faster. I own this one.
-oddguy
