The game that catapulted the Guitar Hero series as a pop culture phenom is pretty good.
Everybody has different tastes in music. The Guitar Hero 3 track list is ok and better than the first 2 games. Some of the better, more mainstream songs are at the beginning of career mode but unfortunately most, if not all of these songs, are covers, which are largely inferior to their original tracks sung by the original artists. The latter half of the songs aren't that good but they are geared more towards hard rock than the first half of the track list. Good thing is they are master tracks. Then there are the bonus tracks that you can buy from the store but aren't part of the main game. They are done by smaller artist and quite frankly, they aren't very good to hear but at least there are more tracks to play through, just turn down the volume.
GH 3 is one of the most important games to have come out. It really put the music genre into the video game map. Give it a try if you are one of the few that haven't.