I posted in other threads about how much I loved the finale, but I just wanted to "log" my vote here, as well.
I thought it was the perfect ending for the entire series. The arc of 6 seasons took us from a seemingly random plane crash, to finding out these people were brought to the island to take part in a battle of good vs. evil that has been going on forever!
Along the way we learned that the island had mysteries that "man" would go to any lengths to obtain. Charles Widmore, Alvar Hanso, the Dharma Initiative, Man In Black, they all wanted what the island had. Jacob's "candidates" came to the island and ended up traveling through time, making personal sacrifices, and learning to support one another in an attempt to help Jacob keep the island's "light" from going out, or being revealed to the greedy world of man.
Once MIB found his loophole, the game was truly afoot, and the final showdown of MIB vs. Jack on the cliffside was incredible! The scene right before the commercial break where Jack is above Fake Locke, and they are preparing to duel, was amazing!
I look at the series as a whole, and when you take into consideration the whole good vs. evil thing, the struggle to obtain the "life source" of the island for personal gain, and all of the personal stories, you will find that EVERYTHING mattered in this story (even seasons 2-5!). I've already started re-watching from Episode 1, for about the 5th time. Hopefully I'll be through the first 5 seasons when the final DVD set comes out.
