Artist book bag design?

I recently designed a bookbag with the cover of Paramore's RIOT!, with just a red and black sharpie on a white bookbag for a friend. It looked really cool, and I want to do another one for me. any ideas? I'm a big fan of Counting Crows, Dave Matthews, Pearl Jam, and U2. i also thought it would be cool to drill holes in guitar picks and use them for pull tags. thanks for all the help.