I find any loss of life to be sad, even if the person "lived a full life", and even if the loss of life ends pain and suffering for the person and their family (like it did when my grandfather passed years back).
For some reason, "celebrities" (I use " " because the idea of celebrity is an ephemeral concept at best) have been dropping like flies lately. Bea Arthur, Ed McMahon, Farrah Fawcett, Michael Jackson...so much for the rule of 3's eh?
I do have to say that as a person who observes and comments on society, and as a comedian, I will particularly miss Billy Mays. He got that his "fame" was all about the character and he never took himself seriously (we call people famous for selling crap who get an inflated sense of self "Vila"s). He laughed at the fact that people knew who he was (just watch the ESPN 360 commercials).
RIP Pitch Man.