I'm in a metal/hard-rock band right now, and we have a singer who doesn't play an instrument on stage. Having always been used to singers in my previous bands also being instrumentalists, it's a new experience for me. He's quite good, and has a very intense performance style, but sometimes I think the fact that he's not playing another instrument frees him too much to be a little (or a lot) Over-the-Top with his physical performance. I guess I'm hoping to hear some of your experiences with singers in your bands. Do you have similar problems with your singer or is it all good (I guess this is a chance to brag or bash among bass-slinging brethren)? How would you address the situation? What do you look for/not look for in your vocalist's stage performance?