It's just the amount of start up time, and maintenance time in game. I have no problem with ones I don't really have to put time into, sort of like running them in the background while I do work as a periodic distraction to keep me focused (I'm wired funny); but too much effort takes away from work results IRL. Can't have that at the moment. Too much going on.
I'm still available to help mod via simple vote counts for travel destinations and such, to help ease the mod pain. You and muz will have to create the game, though.