I was somewhat disappointed with the final episode, due to the lack of answers that were provided.
Walt & Michael? Where were they?!
Walt's powers, never really explained at ALL?
Rules? Who can kill who? Why?
Pregnancy issues? Why do women die that get pregnant on island?
The lighthouse?! What's that all about? Jack?
Who built the four-toed statue? Why?
Why did the smoke monster come out of the source originally, but the light didn't go out?
What IS the smoke monster EXACTLY?
How come Sayid came back to life?
What's the temple all about? Healing properties?
How come there is still a supply drop? Where is it coming from?
Who was in the outrigger chase?
Sayid's victims, who EXACTLY were they? why?
Why did Walt tell John not to "Open it Mr. Locke" in the first series?
Why did Walt keep appearing on the island, EVEN when he was no where near it? (MiB couldn't of took his form, as he wasn't dead)
If MiB couldn't turn into the black smoke over water, or something, how did he appear as Christian on the freighter before Michael died?
And so many more questions left unanswered! Why, Lost, why?!
But i've gotta say, I was pleased with the last minute or so, when it ends with Jack, exactly how it started, as this is what I actually said would be great if this happens (I predicted it!) ;D!