@Sit: Yes, this is a bit silly. It's difficult to have an opinion about someone's "intelligence" based on their artistic expression.
I agree that Leonard Cohen is a bright man. Very well spoken and thoughtful. I add him to my list. :)
I have issue with Curt Cobain, too. It's important to remember that he left family, fans, wife and child with his burden. A true intelligent and caring person would have been more thoughtful of himself and the people around him. Suicide is never a smart move, no matter who it is, and what they accomplish. :(
