Biking (downhill, freeride, and street are my favorites), camping; particularly backpacking, off road vehicles; particularly Jeeps, military technology, product and nature photography, art (digital and analog sculpture, computer graphics, motion graphics, concept sketching, and painting), snowboarding, Legos, fixing things, tools, woodworking, home improvement, architecture, biological systems, consumer electronics, radio controlled anything, portable computing devices, music (just about any type), nature documentaries, and sci-fi movies.