Three things I think about most: code, sound, and ideas.
Code
Programming since 2005, mostly in Ruby and JavaScript. Most of my work is architecture and refactoring – keeping long-lived codebases workable as they grow.
Sound
Synthesizers, audio engineering, sound design – probably more interest in this than is reasonable. I listen mostly to black/death metal and techstep/neurofunk.
Ideas
Philosophy, psychology, how concepts move from one field into another. Mostly reading, for now.