Hmm, maybe its the waning desire to work on something after a good amount of time. Maybe certain "walls" that I run into might discourage me. 'Course, having to deal with school till around 4:00 then arrive home at about 4:30 - 5:00. I don't think I would want to hop right into development often and instead just goof off, letting my brain loose to hop about across the room without much care in the world.
Although, getting this update out along with the exclusive pack might make me feel better. But then there is all the additional content to work on, plus the looming day when I move off to college next semester. :c