My UFOs are because I'm a hand quilter, and there are just so many hours in a day, so many days, in a week, etc. I DETEST the sandwiching step, so I tend to put that off. I have a couple of machine-quilted things I'm working on, but I'm not very good at it, so I don't really enjoy the process. And also, I have the attention span of a hummingbird--it's a lot more fun to start a project than to finish one!