Because I'm in a small company, my official job title is Technical Officer. Lately I noticed that in my email signature I didn't have my job title. I had a look and some of my co workers had stuff like Software Engineer.
As a result, I've changed my job title in my email signature each week. I started with Janitor, got promoted to Blob Wrangler and now I'm a Funambulist. Probably a little unprofessional, but apparently I've inspired my mates at other companies to do the same.