I cleaned my garage today. This was a major undertaking, and I did it singlehandedly. As lame as it sounds, I enjoyed the task, the solitude (because, seriously, if I start a chore like this, it's the only time people leave me alone lest they get enlisted to help), and the finished product, a nice, well-organized space, makes me happy.
I also enjoy vacuuming out my car. The cheap ass little handheld vacuum is so loud, I can't hear anyone while I'm doing it, and a clean car makes me giddy.