In my free time I do a lot of 3D and sound programming and also play music by my own. I have a small music studio where I do beats (reggae, hiphop, soul, jazz etc.) and write some texts. I used to be a reggae singer in a live band for many years but now music is only a hobby cause I don't have much time ;(
Another hobby is building robots and other electronic stuff with microcontrollers or fully analog. My latest project this year was a boombox in a beer crate that I built with my brother...