~no spoilers, but I can't guarantee others' comments~
I just finished book 6 and 7 within the past 2 weeks.
Say what you will about the adverbs, J.K. Rowling is one fabulous writer.
Things I loved:
The underlying message of love
The richness of her fantastic world
Harry isn't perfect
Neville's and Draco's roles
Things that surprised me:
Teddy in the epilogue
Albus's middle name in the epilogue
Less "dumbing down" to American English of British idioms and slang in the later books
Things I guessed before they were revealed:
The exact location of the last thing Harry sought
The eventual roles of two major locations
Why two of his friends disappeared near the end
Things that angered and disgusted me:
the revelation about Harry's destiny
Harry's plan against the goblin
Things that annoyed me:
Albus Dumbledore's constant referring to his own apparent brilliance
How a character would say, "This must be the answer" and it was -- when I could think of a half dozen other plausible answers.
"He said, sycophantically." Come on. Who talks like that?
Things I wonder about:
Did JKR tell filmmakers what items or characters would be important in later books? Or did she leave it to chance that they would include the most significant bits of her incredibly long stories?
Right after reading book 6 I was depressed for a day. I dreaded the ending of book 7 and the end of the series.
The recurring theme of death in the Harry Potter books reminds me of my own losses, some of them connected to Harry, actually, and it's painful. And the world has put a huge investment of time into reading the books. I'm a slow reader (despite doing well in speed reading in college) and my list of books to read is longer than my list of books I want to write.
I can survive in a world without a new Harry Potter book on the way, but it'll take me a little time to get used to it.
Now, back to my own writing...