Since this is a hate thread, I'll try to keep this short.
I enjoyed it. Truthfully, more so than I thought I would. I'm fine with the story, the altered universe, the characters, etc, etc. As a selective Star Trek fan - meaning I really love some parts of the franchise (TOS, TNG) and ignored others (DS9, Voyager, Enterprise) - this film is exactly what I was looking for. It's the characters I've known since my childhood, shown with more depth than they've had in a long, long time.
I dug the story, it's seriousness, and the interaction between the characters. I thought all were handled just as they have always been handled - Kirk & Spock as serious leads, Uhura as the voice or reason, Bones as the more passionate voice of reason, Sulu as a potential future leader, Chekov as overly analytical, and Scotty as someone who doesn't sweat the small stuff.
I thought all did a fine job, particularly Spock, Kirk, Uhura, & maybe most of all - Bones. Hats off to Bones' introduction scene & handling of getting Kirk on the ship. Uhura has more depth than she's ever had.
This film felt like Star Trek to me. In fact, it felt very much like Trek to me. The altered universe and the time travel are very much on par with anything that's come before. The franchise is in good hands. Certainly better than it was. I'm a Trek fan that had given up on Trek to the point of not watching three of the TV shows, nearly walking out of the next to the last film, and actually skipping the last film.
This is Star Trek the way I've always wanted it to be - heavy on seriousness & depth, and somewhat light on humor. I'll see it again, and I'll get it on DVD when it comes out.