It is definitely interesting to hear how many people are into Harry Potter. I may have to try it out.
I have previously been a big fan of Stephen King (my favorite being The Stand uncut version) and some Dean Koontz. I did like Michael Crichton's Jurassic Park. Of course, I had to read The DaVinci Code and that was really good reading despite the controversy.
If you like Stephen King, I highly recomend the "Gunslinger" series (I think it is 7 books) I read the first one, and am going to read the rest of them later this year