I always like drawing Supes with shaggy hair, just so I can make that S swoop extra huge. I don't know why people are so afraid of it. I think it makes him look cool.
Also, on a completely self-serving note, I have some Superman-related stuff up for auction on ebay [link]
and my art book, Ancients & Warriors (with a free piece of original art and a complimentary sketch on the first page) is up as well [link]