I just feel like I want to get money for my characters as I play. What's even worse is that money you make is tied to a character, not to your account... so even though you can customize your band, you have to play through four characters to get enough money before you can dress up your band.
They're small things, but it's still fairly annoying.
One thing about fans is that after you hit 1 million, you get a lot very easily if you play on expert. Of course, it's just one of those things where once they hit the crazy hard songs that I have to go down to hard.