Experiencing Lost for the first time was an experience of EPIC proportions.
It had so much potential, a few key flaws keep it from being in GOAT discussions.
They set up Jacob to be an island deity, with a cool nemesis and intriguing back story, but the final payoff and reveal of Jacob and The Man In Black's history felt rushed and not properly thought out.
The handling of Walt and Michael's characters was completely, horribly, and unforgivably wack. It was NEVER explained why Walt was special, the origins of his powers, or what exactly the Others did to him while he was kidnapped, moreover the fact that Michael, as a father sacrificed so much for his son, to not even get some kind of proper reconciliation between the two, smacked of bad plotting. The theme of EVERY character on the show revolved around some type of redemption, Michael's character was denied that (the actor Harold Perrineau was actually very vocal about that, leading to a short fued with the show runners)
Jack was made out to be this ultra important character with a special destiny....which was to replug the island and die....Not very epic in the grand scheme of things...
The final episode, while beautifully shot and wonderfully acted, was a cop out. No debating that, the show runners wrote themselves into a corner and got out of it by pulling the purgatory/Heaven card. Anti-climatic and unimpressive