I've noticed that people are really into giving movie DVDs as presents as of late. The DVD seems to have wedged itself somewhere between the gift certificate and that really cool inside joke present as a gift that shows you care but that isn't too expensive/elaborate.
Never get me a DVD as a present.
Either I've seen the movie before or I haven't. If I have, there is little chance I am going to want to see it again. One screening of "Pirates of the Caribbean" is plenty, thank you very much. I can probably count on one hand (god I hate that expression, but I just used it, so who knows if I really hate it?) the number of movies that I want to be able to see multiple times whenever I please. Unless you are sure you are buying me a rare I-would-marry-this-movie movie, don't risk it.
Or I haven't seen the movie you bought me. There is usually a reason for this. I skipped "300" and "Transformers" because I didn't want to see them, not because I wanted you to get them for me on DVD six months later.