I picked up a book that has a compilation of his writings, "Common Sense" the "Crises", and "The Rights of Man" (I think there was another one in there, but I don't have the book with me, it's sitting on a desk at work so I can sneak in some reading when there's nothing going on ).
I never realized him to be quite so witty, but the last time I tried to read Paine's works, (years ago), it was all beyond my comprehension. I think you actually have to prep yourself with a liberty-mentality before attempting to read these books and get much out of them.
Reading his account of the French Revolution sets me on fire.
EDIT: Well, I meant to start a poll, but oh well.