I’ve played games like this before on Facebook (FarmVille, CafeWorld, FishVille), and I’ve always stopped playing them in fairly short order. FarmVille is the one I stuck with the longest as I had a lot of friends who played it and we were pretty competitive about it. We Rule is the complete opposite – I do not have one single friend playing it – yet every 12 hours or so I spend a couple minutes harvesting and replanting my kingdom. It doesn’t take any significant amount of my time, and there really is no gratification, so I’m not entirely sure why I do it. My only guess is that it’s a few minutes of quiet before I leave for work and when I get home, and it probably helps me relax and clear my mind. It’s almost become a habit at this point and I reach for my iPad without even thinking about it when it’s harvest time.