I think a good game and a good movie have a lot in common, they evoke the same kinds of feelings and a good story is important in both IMO. You guessed it, I'm not a fan of platformers or simple time-killers.
A movie-like trailer is a more spectacular way of showing what a game is about.
Gameplay in trailers never looks as good as when you're actually playing the game. It also seems very random if there's no story presented to show what is happening and why.







