When the first book came out, I was right at the proper age to really get sucked into it. By the time the last book came out, I had outgrown that, but still wanted to know how it all ended so I still read it with gusto. I've only seen the first movie in full, and parts of the second and third. Didn't really like them, they were too focused on appealing to children, which is great and obviously the way to go, but it did mean I don't like them very much.
Also the whole thing were they changed certain things too much from how you remember it or pictured it in your mind, and it irks.