I find I want to by almost any DVD I want to watch, as it allows me the time to go back and watch the extras, commentary and other material later, and also even watch the movie over several nights, if I'm short on time. Plus I seem to be buying several DVD's at a time now, (new DVD owner, building the collection) and it may take me a week or two to get around to watching all the disks I've bought. One of the few times that I find I want to rent, however, is when a movie I want to watch is available only in a crude pan and scan or non anamorphic transfer, or has little or no extras. Many of the DVDs which came out when the format first showed up are of this variety, and I've purchaced a few of them, and usually been disappointed. So I just rent these, return them, and hold out for an extra packed, pristine transfer special edition to come out in the future.