Around 5 or 6 hours, most of them during the weekend.
But it depends of the game I'm playing. With Alan Wake and Saints Row 3, bought during the last Steam sale, I played 1-2 hours almost everyday and twice or more during the weekends. Now, with AC brotherhood I only play during the weekend.
Yet I keep buying games even thought I don't have enough time to play them all!
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.