My client was thinking that puppet style animation would be a good approach. There are some underlying things about this technique that I think do service to the message he wanted to convey. Above are some variations on character design.
I did get more elaborate than what is typically done with this type of project. Instead of a collage of stock photos for backgrounds and props, I produced illustrations for a particular atmosphere and light quality. I also used full motion for the mouth synching. It’s two minutes of talking, and Larry the ‘Leech’ wants to come off as smooth as possible.