I found myself thinking that as the years passed some bands have changed. Like for example Green Day. They meant everything to every punker kid that ever lived, at least so I think, but now a days their sound seems to have changed.
Another example is My Chemical Romance.
Their album "Three Cheers For Sweet Revenge" wasn't one of my favorites, but "Welcome To The Black Parade" is one of my favs.
Maybe I'm just picky about what songs I like and which I don't....

Discuss
What bands have you noticed changed?
Before and after, which did/do you like better?
Do you feel that some of the changes made are good or bad?