I may or may not disagree with many of the excellent points here, but I'm only going to respond to KBM.
Really? For shows like LOST that depend on heavily on a storyline, if you have a terrible ending, that ruins the rest of the show. *maybe* if season 3 had been garbage level TV like season 6, but then the rest of the show, including the end, was good, then it'd be fine.
But a bad ending ruins the entire series, especially for a show like LOST.
sidenote:hoping the same thing doesn't happen to ASOIAF, given that the series seems to be losing a LOT OF FOCUS.
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Who says you're not perfect?
Who says you're not worth it?