After years of simply being astounded by animation instead of messing around with it at all myself, I got into it a little last night. Here's my first-ever rotoscope.
I know it's a fairly simple thing, but it took ages. I now understand why all the animators back in college were so pale and wretched, yet so absolutely happy with what they were doing. It was an intoxicating process, and I barely slept. This seems to be a good use of time for exploration in the future, if only for fun.