When I finished my film I stop drawing the main characters. I stopped because it was all I drew for a whole semester. For months and months I designed, animated, and colored this guy and his monkey, so I stopped. But then a few days ago I sat down with my sketch book and I wanted to draw them.
I love the feeling of knowing exactly how to do it. There is no question of where the eyes go, or how long the legs are. The pencil instinctively knows where to go. I definitely recommend going back and drawing your old characters. And if you don't have an old character just draw somebody elses. For example, spawn, e.t., ziggy... the list goes on.
