I've been researching Illustrators. Part of me wants to do this. Another part of me wants to make movies. Concept art. Bring things from the written word to life on the page. I found a great blog with some awesome illustration work. Go check it out: http://jesperejsing.blogspot.com/
This guy is really great. He explains his process. I realized I have the sketching & thumbnail thing down, but I need to learn to do painting thumbnails. I just try to jump from pencil to paint without any color testing or idea of exactly what color is going to go where. Color composition is just as important as overall composition.
I really don't want to use a computer for illustrations, but I am slowly realizing it must be done at certain steps. Publishers use this. Dimensions & industry standards & such. Looks like I'll be saving up & maybe even taking some classes to figure out how to do this.
Here's a few more illustrators to check out if you are interested in Illustration work:
Jesper Ejsing
Mo Willems
Brett Helquist