Based on the comments here, I bought
Harry Potter and the Prisoner of Azkaban on Saturday. And while I couldn't put the book down (read it in one day), I can't honestly say that I'm enthralled with the series so far. I keep waiting for that magical *something* to jump out and pull me in, and it just hasn't.
You guys were right: I liked
Azkaban much better than the first two. It was a bit darker, and seeing the kids acting out like surly teenagers was fun to watch. I think that my bias against fantasy is affecting my ability to enjoy the books; the last fantasy series I read and enjoyed were part of Robert Aspirin's "MYTH" series.
I'm not sure if I'll stick with it since the waiting list for the most recent books is so long at the library, and I don't want to line J.K. Rowling's pockets any more than they already have been.