It depends on 2 things. 1. I find a cool pic that I just want it to be my Icon or 2. Depends on the club I'm active on at that time, so maybe quite often.
Like, every 2 or 3 months or so. I think I once kept on for a taon xD I'm too lazy to change it lolz. But not you have ibingiay me incentive to change it..soo...I guess I'll change it today, or maybe not xD