Dead Poet's Society is the answer I've been giving for those get-to -know- you surveys, but I also like The Breakfast Club, Grease, Stick It, Step Up, and new favorites: Hairspray and The Peaceful Warrior.
Sidenote: The Peaceful Warrior is about gymnast Dan Millman. It is based off of his book, The Way of the Peaceful Warrior. I highly recommend both; they will change your life and your way of thinking.