Of course, that's up for debate! Nevertheless, here is the list -- and each movie title links to a separate page with more details AND (even better) video of the trailer in question.
See, a really great trailer makes you want to run out and see the movie.
Enjoy! (Via the Rhetorican.)
Oh, I can't resist. The Cinema-Mad Sibling and I really enjoy stand-up comedian Pablo Francisco's parody of movie trailers (and he does do an uncannily accurate impression of the famous "movie trailer voice"). Here it is:
Sometimes the trailer ends up being better than the movie! On that note, check out what the Onionistas did last summer: