Many people (especially kids) adopt a punker than thou attitude if a band starts to stray from the sound on their first demo...and invariably scream, "SELL OUT!"
As I get older, I am much more forgiving in my judgments and open to different styles.
A recent example is one of my favorite bands, Against Me! When the band first started it was nothing but acoustic guitars and screaming...now it is a much fuller and produced sound. I still like the new stuff, but admit that the earlier stuff is some of my all-time favorite.
In general, do you think bands "grow" into different sounds or do they "sell out" in a deliberate attempt to enter the mainstream?? And what does this have to do with chess shirts? Well, nothing really.