Ok, so I see that it was a love/hate ending for a lot of fans, as expected. I would probably give it an 8 for story, 9 for execution. [Edit: The news is reporting the finale as saying the islanders were always dead and it was all purgatory--wow, no. They should rewatch the part where Christian explains it all point blank.]
Was the build-up pointless? I don't think so. All of it--the Others, Dharma, Jacob/MiB, their lives on the island--it was important. In the eyes of our castaways, the most meaningful part of their lives were the relationships they had with each other on the island. In the audience's eyes, we can presume that they succeeded in keeping evil/MiB from escaping and protecting the light/electromagnetic source and thus saving the world (side note: it was confirmed in the preview show the MiB and Smokey were one). The Others, Dharma, Vikings, whomever--these were the groups that FakeMom and MiB said always came, fought, corrupted, etc. They wanted to figure out and perhaps harness that light/water source for their own purposes, always wanting more. Our Losties rose above that, so Jacob was right about them after all. It wasn't all for nothing, but there were aspects of it they never answered, and I understand it's left some people unsatisfied.
Alt-Reality. The alternate universe is apparently how they dealt with their decisions and perhaps their regrets before they could move on. For Jack, David and his former marriage to Juliet were perhaps how he dealt with his own father/son issues and Juliet's death. For Sawyer, he is a good cop instead of a con artist. And so on and so forth. For Locke, though, even though he could walk again in this afterlife, it turns out his life really was that tragic. I guess it was suitable for MiB to be in his form; he was also a tragic character, even if evil to the end. The most straightforward part of the episode was probably Christian's explanation--they all died at different times, and wanted to find each other before they moved on.
Minor characters. Frank is alive, and flies most of the survivors out of there. Richard begins to age, and now wants to live. Would've been nice to say something about Isabella, but I guess he had his closure with her already. Ben got to be special as Hurley's #2, as he wanted to be Jacob's #2 originally. And he was redeemed in the end. Eloise doesn't want to move on and lose Daniel, who's not leaving yet. Ben now doesn't want to move on either. Perhaps Daniel and Alex haven't died yet in the real universe and they're waiting? Frank never showed up in the alt-reality. I think he was never that tied to anyone or anything.
Fight scene. Jack's flying punch. lol, but good one. I imagined more Smokey in the fight scene, but I guess they wouldn't have been able to overcome him. More teamwork, too, rather than a shot to the back. A few more punches for our friend Ben over here! Hurley is the new Jackob.
Some answers. It wasn't the bomb that "worked," but Juliet was just crossing into the alternate reality as she was dying (thus why she said the dutch and coffee lines before she died as well). The cave is actually a structure built by some ancient people. Desmond's purpose. Who stayed and who left or tried to leave. No replacement for MiB.
Ending. I had waterworks over here, and I wasn't expecting that. The kids were a little distracting, we had to get them to bed, etc., so Manny and I watched the very last part separately. I think it was good, because I don't think he cares for death endings (we'll have to discuss it later), and I like movies like this. Maybe because I've watched Asian movies for so long. And that last part with Vincent! I'm a total dog person, so that was just...wow. He didn't die alone. I was never into the love triangle stuff or any love subplot, but I think they did a good job with the storytelling. They ended it the right way, I think. It came full circle. I haven't seen the alternate endings yet [edit: oh, nvmd--Kev said they were just for fun]. Plus there are 20 extra minutes or so that will be on the DVD.
Now for some of disappointments. 1) Michael and Walt. If Ben who murdered way more people in cold blood could be invited to move on, why not Michael? Poor Michael, stuck on the island whispering for eternity, and yet he had shown remorse/regret/a turned heart twice already. No indication of Walt being special or a moment from him. I think they gave his role to Desmond, but there could have been something more as Walt was the one with active powers.
2) Miles. I'm glad he just kept running away and was presumably safe, but would've been nice if he could've revealed more in the end. Like how was it possible for Sayid (and maybe even Claire--I still think she died in the explosion) to come back to life? Didn't need to be explained in the finale, but comic relief was not enough reason to keep his character.
3) Hurley can make new rules. So, I guess people can get off the island. Why have any? I guess he made it so he could die, too?
4...10) I don't mind that they didn't answer everything, but I think they should have given us a couple more explanations, even if deadpan or straightforward, earlier on in the season. There were only two answers I wanted. The first was the interest in the children and particularly Walt (ok, foreshadowing the candidates list and Desmond's role, but...sigh), the second was why women couldn't have kids (yeah, okay, the radiation from the incident or Jacob's doing, your pick--but then why Tawaret, goddess of fertility, and bringing Juliet in, etc?). I get that it doesn't matter in the big picture for the castaways, but if you're going to answer some, you might as well answer the questions you spent so much time building up. I accept they won't go way back to the Egyptians or whoever built the statue, temples, and structures, but they easily could have addressed that more back with the Dogen stuff. Even more science with Zoe. I know they're saying it wasn't about the mythology or scientific explanations, but a lot of it was.
Still, it was a solid ending for me. I'll probably never be so invested in a TV show again. Oh, and 24's series finale is here. :(
What did you all everybody think?