Hey, guys, I haven't posted here in a really long time, but I was reading all of your thoughts and I just had to post.
I loved this book so much. I think it's my favorite of all of them now. The stuff that really got to me was Ron's departure and return, everything that ever happened to Severus Snape, and of course, when Harry walked into the forest, turned the stone three times, and asked his family to stay with him to the end - gah!
I think it had to have a happy ending because so much crap had happened to Harry prior to this final chapter - this book was all about triumphing over death, and I think that really meant Harry coming to terms with all of the people he had lost previously. Or really, just the notion of loss.
Other things I liked (although there was so much):
Harry calling him Tom Riddle at the end - I've always thought that everyone should call him Tom and not the self-important name he gave himself.
Harry naming his son Albus Severus - Snape always was, even before this book, sort of a father-figure to Harry (a semi-horrible one most of the time, but still).
Dumbledore telling Snape that maybe the Sorting hat chose Snape's house too soon. That and when Snape asked to look into Harry's eyes before he died just about killed me.
Neville leading the resistance at Hogwarts and kicking some serious ass (and with plants, too!).
The fact that Voldemort ultimately bit the dust because he, just like everyone else (except Dumbledore) underestimated who Snape was as much as he underestimated Harry.