I was at the midnight showing in IMAX. The crowd went crazy for the TDKR trailer. Apart from that, they clapped at too many inappropriate scenes. Like when Harry first gets back to Hogwarts through the portrait and all the students clap, I guess my audience decided "Oh, they're clapping. We should clap too." They also clapped when McGonagall said that Seamus had a talent for blowing things up.

I cheered at a few scenes myself, though. Specifically, the Ron/Hermione kiss, Molly vs. Bellatrix and Neville killing Nagini (the last one got more of a reaction than Voldemort dying). What was also interesting was that for about a good twenty minutes from the time Snape died to when Voldemort "killed" Harry, all you could hear throughout the theater were people sobbing. I must admit, I did get a bit teary eyed during the Snape scenes and the forest scene. Seeing Lupin and Tonks like that shocked me even though I knew it was coming. They looked like they suffered a lot, especially Lupin. Fred's death didn't effect me as much as I thought it would. They should have actually shown it.
Snape's memory might have been the best scene in the film for me. Really powerful acting from Alan Rickman, who finally unleashed his talent. I've always thought he was a bit subdued in the previous films but he completely owned the movie. I also liked the way they digitally de-aged him, because it looked better than what they did for the epilogue (though I didn't mind that makeup). I also thought that Neville stole a lot of the movie. I loved his speech that he made. And I was so happy when he killed Nagini. For a second, I thought they were going to have Ron and Hermione kill him. Molly vs. Bellatrix was awesome. I liked how Molly defeated her without using Avada Kedavra. So much stuff in the film was so awesome that I could forgive it if it didn't follow the book verbatim. I liked the epilogue. The makeup wasn't that bad, and I loved that Harry speaking to Albus Severus was directly from the book.
I don't have any complaints other than the fact that the battle was glossed over a bit and the ending was a bit too abrupt. I still think people should have witnessed Harry defeating Voldemort. Also, they shouldn't have had the back of Ron's head blocking Hermione so much during the kiss. The 3D in the film was only worth noting during the Gringotts scene and the Room of Requirement scene. So I'll be sticking with 2D from now on, even though Real-D has those 3D Potter glasses.