I bought Cosmic Ghost Rider #1 last week and it was so good I can't stop recommending it to other people. It's the first comic I ever bought more than one copy of, and if I had a million dollars I'd buy a couple hundred and give them out to anyone who is interested.
I'm new to comics so I'd like to hear what issues of comics you folks read really impressed you and made you want to tell the world about. In particular, I would prefer they be modern (last 10 or so years) and not "classics".