I tend to draw myself a lot because I'm about the only person I feel comfortable enough to ask to draw and I'm always around. It has little to do with self exploration and much more to do with convenience.
The other day the idea of drawing my head in a bell jar just entered my mind. I could, with a small amount of concentrated thought, attach 'meaning' to this imagery. I'm sure I could find plausible links to life events and emotions but I don't really believe its about anything. I love taxidermy and just thought it would look cool.