I was sooo stoked when I bought my copy. I walked out of the store just looking at it in my hands and grinning

i haven't been a HP all that long, that's how fast you get hooked....
Anyway, I loved the book. I was a delight, better than most books I read. I did not however feel that it was JK's best. If you read GoF (or any other for that matter) then read OotP, you'll see that it lacks the creativity and vividness that the other have. Its still great, but not as great as her others.
A lot of people aren't liking all the anger and angst that Harry is doing. But that was my favorite part. With the exception of a few places where it dragged a little, i enjoyed it. It's gratifying to know that even Harry can feel like that. I know when I read, so many times I thought, "Wow, I know EXACTLY what he means!" I was kind of a stupid, angry, frustrated sophmore last year and i could relate so much. It was very gratifying in that sense.
Also, I enjoyed all the information we received. We get LOADS of new evidence and tid bits of Harry's past. I'm going to read it again soon, and then I'll give you a better breakdown of the information sometime. But I read it a month ago and am now rereading the rest of them to refresh my memory.