Yeah, if I'm fairly familiar with the song (Garbage, Black Sabbath) than expert really isn't all that hard. I KNOW I haven't been singing in tune, even.
I enjoy the drumming a lot, but I SUCK at it. I'll get off the beat and never find my way back on it. I think it's really good for me though, I've always needed more rhythm practice.
I haven't tried the guitar yet actually, I guess I figure it is similar enough to guitar hero that's it's not like OH MAN MUST TRY THIS NEW AND EXCITING THING!!
ORANGE BOX! Chris got that and is demanding that I play Portal once I have a spare second.