Aha, nice switch in avatars Peronel; to fit the mood, eh?
Anyhow, I agree with the epilogue comment, however, the one thing provided in there that made me smile was Harry bestowing his youngest sun with the middle name of Severus (And I'm sure James took the Sirius mantel, but I suppose that's a guess). A lot of people complained that even when Harry discovered the tortures his father had put Snape through, still Harry continued to loathe him. That nod towards him in the end was good enough for me to see that Harry finally came to respect him for all he had done. And as for Snape being a good guy, I doubt it was meant to be a heavy plot twist--it was obvious at the end of Half-Blood that he would turn around, I wasn't sure why people "debated," over it. The only twist I saw was why Snape had become an agent for Dumbledore--I didn't expect that, and on realizing it I was hit by how hard it must have been for him to see the product of the guy who made his life hell with the girl he had loved. Guys are more competitive than girls, testosterone and all that, so imagine what was going through the guys head when he knew they had bumped around in the night (gasp).
My favorite aspect of the book was the lead-up to the battle with Voldemort, even if the battle...let me find the right word...oh, here it is--sucked. Dear Christ I wanted explosions galore and the muggles running in teh streets, and all of Harry's untapped power unleashed as cars fly through the sky, explosions stroke the night, and again, muggles run around screaming for dear life with their thumbs up their bum.
My last complaint, while not as big. Why the hell was it Mrs. Weasley who killed Bellatrix? Come on! I don't care that Rowling wants to preach her little love story so that Harry never intentionally kills anyone, but Jeez, Mrs. Weasley taking the charge? I was hoping someone at least...worthwhile would take the charge on that front.
Anyhow, that's it. Biggest plot twist of the whole series?
J.K. Rowling used the B-Word.