Later Guitar Hero games on the PS2 sucks hard. The animation is choppy, characters look like stop-motion as well their hair being stiff as a broom, and the loading is longer than any other version. The Xbox 360 and PS3 version were better.
Guitar Hero III: Legends of Rock is undoubtedly the best game in the series. The amazing soundtrack, superb wireless guitar, subtle tweaks, and excellent online multiplayer are exactly what fans have been wanting from the series.