I've noticed that my ability and attention span on writing projects waxes and wanes. It's a curious thing, but it seems that I'm most active from the start of spring to the end of summer. Looking back on this blog, my most productive months were in April, May, and June. This seems to happen in all my creative projects, not just this one. Winter does not seem good for my creative soul.
That said, my current job keeps me quite busy during the day, so I tend to feel worn out by the time I get off. It won't stop me from being creative, but it might put me in the mood to veg out in front of the TV or mess around on Facebook instead of writing. It kinda sucks that way. It's so easy to get distracted.