Since I finished my Ph.D in 2005, I've been building furniture. I wouldn't call it fine furniture by any means, but I'm having a lot of fun with it.
One of my first projects, after the obligatory bookcase that everyone makes when they start out, was to make some rolling, locking cubbies for storage at a preschool where a friend works. Since then, I've built cabinets for shoes, a closet (Schrank) to hang clothes, many sets of shelves, boxes, a cat tower (it's amazing what they want to charge you at a petstore for these), an entertainment center, and I just finished my 2nd queen-sized bed. I recently was able to help some neighbors by doing restoration work on a semi-antique china cabinet. Other recent projects have included putting a new seat in a spring supported antique rocking chair, and building a basic Arts & Crafts style bookcase with wedged through tenons and no hardware at all.
I'm slowly compiling parts for a horizontal drum-type sander ( click here for a sample), which I hope I'll be able to use as a jointer to flatten boards as well as sand them.
My other hobby right now is playing the didgeridoo.
I'd been intrigued by circular breathing for a long time, but when I read an article in the British Medical Journal explaining how playing the didgeridoo was nearly equivalent to using CPAP for sleep apnea, I became much more interested. Not only does the didgeridoo sound pretty neat, but it's good for you. I've been playing nearly daily since I read that article.
My wife Sarah is involved with Geographic Information Systems (GIS). At some point, we'd like to do a GIS/Psychology project. But that's in the future.