I guess you'd have to call this a hobby cause I don't get paid, but composing/arranging this kind of music takes forever, so it's at least a full time hobby.
Composing/producing music has always interested me, and although I play a couple 'real' instruments to a very mediocre degree, I've always gravitated towards electronic music production, starting back in 1997 with 'tracker' programs for the PC.
Drum and Bass was my first calling, and I released a couple tunes under the name Stillz in the latter part of the first decade. I've turned a bit of my musical focus elsewhere, and have dabbled in mixology, throwing in tunes from all over to create a certain vibe.
My main tools are Ableton for mixes, and Reason for production.