I tried to think of characters that might feel right in some older classic cartoons. It's funny how I started drawing a blank (pun intended) when trying to think up some of these characters. Kind of like when you go to the video store and suddenly all the movies you had been thinking you wanted to see slip right out of your head.
These are two of the ones I left rough. I love doing these kind of rough drawings, getting a nice attitude and line of action. In a way this is how I do my thumbnails when I am animating a scene. Besides just getting the acting down an animator has to create pleasing drawings. That's where being a good draftsperson comes in. I find it's best to just get something down on paper than to sit there wondering what the best way is to start.
As I've gained more experience I've found that it takes fewer tries to get the result I want. All animators have their own way of approaching their work, some are rougher than others while some artist see it completely in their head before they begin to draw. I tend to fit somewhere between the two. If I can't seem to get the right pose I begin from a rougher state but often once I am used to a character my drawings become cleaner because I can see it before I draw it.