Wouldn't want to write the X-Men, and I suppose the X-Men is the ultimate Marvel comic, and I really wouldn't want to go anywhere near it at all, although on the other had I wouldn't mind having a crack at something like the Punisher.
You have to stay in shape. My grandmother, she started walking five miles a day when she was 60. She's 97 today and we don't know where the hell she is.