My tripod use has gone up significantly over the past few years. I typically use a tripod in the following situations:

landscapes
architecture & real estate
group pictures
in-studio
macro
panoramas
self-portraits

Times when I don't use a tripod? Whenever I grab the camera and walk out the door to walk around the neighborhood and, typically, sports or event photography where it's more run-and-gun type of shooting (although I do use a monopod sometimes for long field sports). Also, for outdoor off-camera flash lit portraiture, it's about 50/50.

My tripod is an Induro CT314 with an Arca-Swiss Monoball Z1 head.