Very quick sketches done in flat colours, like the examples there but they can be in more real-ish colours if you so desire. These will usually be elbows up unless I get carried away.
A full coloured drawing focusing on just the character's face.
Waist up of a single character with plain/textured background.
(secretly I like doing these the best)
Coloured, full body of a single character with minimal/plain/textured background.