Bought Guitar Hero Metallica today. Probably the best collection of songs in terms of fun there is on one disc. It starts strong and never ceases. Whereas most music games start off with very simple songs, this does not. But at the same time it isn't stupidly hard like Guitar Hero 3. There is only one song I'm struggling on at the moment (War Ensemble) but I always feel like I'm being challenged. Just pushed beyond comfortable which is much more fun. Even if you're not a Metallica fan (it has many other artists too, by the way) it's still utterly fun. One of my house-mates has had a blast on it and he hates any kind of heavy music.
Double bass drums too. Well, when I get a second pedal