RedFive said:

I think season 5 is the best and most consistently strong season of Lost, even though most people liked season 1 best.

Season 5 was pretty good. But I'm pretty sure it painted them into several corners which led to my epic sad at Season 6.

Primarily: Can they change the past? There are 2 potential outcomes, and both seem highly dissatisfactory. If they can't change the past, then Season 5 was a big waste of time trying to do it. If they can, then seasons 1-5 are a waste of time, because it's that past that's being changed and season 6 is essentially a mulligan. That's why I thought the apparent "dual time line" approach to the start of Season 6 was genius. It maintained both potential outcomes which seemed to solve, or at least prolong, the problem.

Man, I used to so love LOST.