I like building and taking apart electrical circuits. I built a stepper motor driver that can be controlled by the parallel port on my PC.
I also build PC's for myself and my friends, been doing that since the 386 days. You want to know how geeky I am? I actually bought a 387 math coprocessor for my 386DX back in the day.
I also have a jet ski (Yamaha Wave Blaster). And I go to the gym almost every day.