Most of the time, which fits "by day" definition - a C++ programmer for living. The evening though gives some more freedom for self expression: Playing with my son, learning something new, write few lines of code for some hobby project, going to gym, playing guitar, read a good book or get hands dirty with screwdriver or soldering gun - in short, I wish I had few hundred years more to live just to get enough time for all, that I enjoy doing :) And also a sky-lover, holding Canadian CPL and Instrument rating.