(Not games) Somewhat professionally - from 0 to 30/60 hours a week. It depends on what project I am doing or upgrading. Mostly web based.
Games related, from 2 hours to 30ish. Before I would spend my hobby time on learning and experimenting with technologies/designs like OpenGL, Lua for scripting.
I have made 2/3 small game demos (to apply what I am learning ). Currently making my first full game (just a small 2D space shooter).