Mine changes at whim.
I'm currently sporting "Hylian Gunslinger." Semi-long story:
One recent evening, on one of the topics, the idea of guns in LoZ was brought up *again* and *again* people got all squawky and panicky about it and it annoyed me. I decided to change out my avatar and my signiture to promote a fan ficiton of mine that dealt with Hyrule being turned into a world of guns (a Wild West alternate universe story). So, I have an avatar made from an oekaki I did of the story's Cowboy!Link and a link to the fanfic in my sig. I thought, "I might as well change my title to go with this. I'll be the Hylian Gunslinger just to piss off the people who squawk endlessly about the idea of guns in LoZ."
So, yeah, my user title is at its current to raise some eyebrows and annoy some people.