I also buy all of my movies. Like some others above I have plenty of Disney etc. in the 300 DVD-Changer (now half full) and it is perfect for the kids. For myself there are still a few in the collection I haven't seen. Last time I rented was 1 year ago, and in total I've only rented a few (<5).

In case someone is interested, here is my DVD-collection:
[Link: dvdprofiler.com]