I agree that blink and green day went a bit too mature and boring, but I still liked their new stuff, though preferred old, and it was no reason to put me off the bands, since you can still listen to the old music They had to try new stuff sometime.

Anyway, I can't think of any it's happened with over a long period of time in terms of their music, but The Kooks and Razorlight in a short space of time. I thought the kooks were pretty cool at first, but I saw them live (well on tv anyway) and they just bug me with their curly hair and tight trousers.

And then most of the other songs on their album annoyed me. Razorlight I liked, and still the music is okay, but the guy thinks he is some God in his tight white body outfit thing and >> It put me off. I know its not all about image but uhh, eww. I can't stand trendy indie bands with massive egos.