Buying movies isn't for everyone. I just happen to prefer ownership and have always wanted a library I can access anytime I want. I guess it started back when Beta-Max tapes were alive and I had a friend who had a pirated copy of Star Wars. It was the worst copy of a movie I'd ever seen but it was still cool to watch it at home when at a time movies were not even offered for sale to home users.
Movies I don't want to own but want to at least see once then I have Netflix for that....only catch is you can't rent most new releases on their first week and have to wait up to 30 days.
For you guys that can't say no to lending out your DVDs then do what I do.....many new releases come with digital copies and your buddies can bring their laptops and get a copy to watch that they can stream to their TVs and you don't have to worry about getting a scratched up, fingerprinted, miss handled disc when you get it back.....if you even get it back. :unsure
Then there's always movie nights when a few of your buddies come over and watch a movie together.....I have a smaller size theater popcorn machine just for that purpose.