The first page of the article talks about what kind of person Callahan is, and then the next couple pages move on to public opinion about Callahan's comics and his biography. The best part, though, is when Callahan starts talking about his own disabilities, and what he thinks about political correctness and how society in general treats the handicapped. The article's mad old, but I think it's still relevant, so I'll post the link here - I recommend reading it (the first 3 pages, anyway).
http://www.nytimes.com/1992/06/07/magaz ... gewanted=1
Just for flavor, here's a cartoon of his.
