I didn't really, well yeah, I DID feel bad for Dumbledore, but I think the greatest shock for me (and it was upsetting) was that 1. Snape's really on Voldemort's side.
2. SNAPE of all people, is the Half-Blood Prince!!!! I was certain it was Tom R.!
3. Tonks is sweet on Lupin, and vice versa?!??! (silly to say, I have very mixed feelings on that one)
and 4. Dumbledore dying. I mean really, that's cold. I've never connected to Dumbledore, but I think I was beginning to, in this book.

All in all, I am far from satisfied, and Mrs. JK had better hurry and get the seventh book out!