Almost none.
Been through the 80-90 hour per month phase, but for the last year it had been 10-20 per month. Last few weeks haven't even logged on, and am thinking about deleting account. I think its just burnout, but could also be the natural history of game addiction. Never stayed with a game anywhere near this long before.
Probably will be back after getting a break. After all, nothing like it anywhere....and nothing gets me like aviation.