Painting one faction or jumping around?

Do you find that you stick with seeing one project/faction through when painting or do you end up jumping around to others and have a bunch in various stages of completion?

I find that, since I'm mainly interested in the painting aspect, I jump around to different things a lot more and maybe finish 1 or 2 miniatures here and there. I guess if I was trying to get an army together for table top gaming, I would stick with mass painting one faction. The painting is really therapeutic for me though.