I love it when I discover cool stuff like this shared by fellow doodlers on the DA flickr group. This doodler does not waste paper. I feel like monocat's sketches really capture the spirit of spontaneous doodles as almost every inch of the page has something crammed into it.
Even though it may look like a mishmash of unrelated doodles, there's a cool chemistry between the colorful characters as they seem to be reacting to one another and their predicament of being squeezed together and having someone else intrude on their personal space. Enjoy them, I did.