I don't necessarily buy DVDs because I think I'll watch them over and over again -- though some I certainly do and have -- but rather so that I can share those movies with friends or acquaintances who've never seen them. And often it's a great thing to have a nice DVD collection around if you're hanging out with friends but are too tired to go to another bar or do something else that's social. So I've tried to collect a range of DVDs -- I've got a big bunch of "artsy" movies (Truffaut, Godard, Bergman, Renoir, et al.) as well as fun college-type comedies (e.g., Old School, Zoolander, Super Troopers) and good popular dramas (e.g., Diner, Ordinary People, Good, Bad, and the Ugly).