Some days I can’t make my pen go the way I want it to. I can draw the same line over and over again, and it’ll keep veering off course. It takes gnashing of teeth and crossing of eyes to make it work. Other days, no problem. Today was the former, unfortunately, but I did finish the coloring book page with the aerial view of the Boston Medical Center area. I actually prefer a slightly sketchy look. To my eye, it gives character. I don’t think the lines need to be perfectly straight. I started coloring it in because it helps me see the overall drawing better. You might remember the little section of this that I was working on a day or two ago: I had to make a few changes to the Medical Center building, and I added in a lot of other details. Such as more trees, and windows, windows, and more windows. I draw pretty goofy looking cars, I have to admit, but I’m okay with that, too. My South End …