I want to see a Vincent-centric episode. During Season 1, one of the rumors about the season finale was that there would be some flashbacks for Vincent. I thought a really cool twist would be if there was something really important that happened in the cargo hold of Oceanic 815 just before it crashed. Something that would change your perception of what was going on on the Island. But the only one who would have seen it was....Vincent, because he was locked up in the cargo hold during the flight. But of course, he can't tell anyone about what he saw because he's a dog.
Hmmmm....I guess that's a little cliche. "The one person/animal who saw the event that's the key to everything can't communicate what he saw." I assume there's something about that on TVTropes.