Oh, and for the purposes of the comments thread for this post, I grant full spoiler power, seeing as how I'm writing spoilers in the post itself. So if you don't want spoilers, don't highlight the text below, and don't read the comments, either!
These are all just random thoughts, which I'm plopping out there as they come to me.
:: I love that Rowling had it come down to Harry versus Voldemort, for all the marbles, in front of everybody. That was a masterstroke.
:: There's a little too much deus ex machina in the front half of the book. Too many times Harry and company seem to get the key bit of information by sheer luck, with one particular instance -- when they just happen to be huddling somewhere in the countryside under the Invisible Cloak when a group of people who happen to know an awful lot about what's going on just happen to pick that exact spot to sit down and have a long conversation -- standing out.
:: Hey, David Weber! This is how you stop your final battle in order to have an infodump. JK Rowling has her stylistic faults, but she is the simple best writer on the planet at conveying plot information without grinding everything to a halt while she does so.
:: The single best thing in the book, and maybe the best moment in the entire series, is the moment of Severus Snape's death. He expires as he gazes one last time in Lily Potter's eyes (since we've been told many times that Harry has Lily's eyes).
:: Snape was a good guy after all. I always thought so. Except for when I didn't. However, it didn't play out the way I thought it might: turns out that Dumbledore didn't need to swear Snape to an unbreakable vow in order to commit Snape to killing him. (Of course, the interesting question there is, what if Dumbledore had not been already doomed to die?)
:: At times, the Death Eaters seem like Imperial Storm Troopers, don't they?
:: Well, a Weasley had to die sooner or later, right? I'm surprised Rowling didn't mine that for one last bit about everyone's inability to tell them apart.
:: I knew Neville would have some big role to play! Yay!
:: I was completely wrong about the Dursleys! Boo! I thought for sure there'd be some small way in which they turned out to be important in the end, but not so much. Just a bit of character growth for Dudley. (But I do think Rowling missed an opportunity here. In the Epilogue, it would have been cool if another of the new students heading to Hogwarts had been Dudley's, yes? Another Muggle-born?)
:: I liked that the events of Dumbledore's life as depicted in the tell-all book are true, and that it's all left up to interpretation.
:: What's next for JK Rowling? Hogwarts: The Next Generation? Something else entirely? Or will she just put down her pen and bask in the fact that she's made Harold Bloom's life miserable? No idea, here -- but for my part, thanks, Ms. Rowling. You told a hell of a tale here.
And there it is. So long, Harry. It's been fun.