It can be a blessing or a curse. Some bands seem to evolve and change over time keeping the die hard fans and bringing in new ones. Others get panned or called sellouts because their music becomes too mainstream. Other bands don't ever seem to change their sound and sometimes loose their hardcore fans because their music becomes boring. It seems like a delicate ballance and sometimes it's a damned if you do, damned if you don't scenario. However, some of the greatest bands of all time have managed to pull this off for decades. What are some of your favorite bands that did, or didn't mange to effectively evolve? Did you ever discover a band that had been around for a long time but never really cought your attention, but now you love? In your opinion(fan or not) what band has done the best job of staying relivant for the longest time? Which band do you feel has managed to stay relivent but sold out and lost their origional sound?