I had been going to shows for years, but I remember one of the very first times I went to actually get an autograph, it was George Perez. I handed him a print of an Avengers #19 volume 3 (it is a black cover). I asked if he could sign it and just draw a little Ultron head. He said 'I am going to have to charge you for it', to which I said, that is fine. As I opened up my wallet, to hand him the yet determined price (nothing was posted as to what he would charge), he handed it back to me a few seconds later, signed in silver sharpie on the black, with an awesome Ultron head sketch, and said 'Don't worry about it'. I said 'Are you sure?!?' and he kind of smiled and waved me on. Nice guy.