I draw through the classes I don't like. Even in PE I'm drawing... in my mind.
It's not just random doodles, most of the time. I do crappier versions of stuff I do properly at home. Do stuff I think I can use, like my little comic doodlings. I like to doodle. Not just out of boredom, 'cause doodling will be life.
...I'll probably be poor.