“Connoisseur.”
Do it! Do it! 
Easy, peasy, Japanesey.
Sower of Discord
Care for a sip?
Not everyone has their own personal slogan.
That’d just tempt me to get one that said
Shower of Discord
How about Coyote? Too obvious?
Has anyone done “I paid for my membership and all I got was this custom title” yet?
If I used that it would have to be;
Coyote, Supergenius.
Then people would expect me to be all smart and junk.
Love it 
Another possibility:
I have no idea what you’re talking about… so here’s a bunny with a pancake on its head..
Though it may not work without the visual representation.
I’ve been called “kay,” and “kayla,” and “kaylas” so often (not to mention “her,” and “she”), that I think some clarification might calm my nerves, so:
Father of Kayla.
Too long – there’s a 30-character limit.
In the same vein, I’d probably get “Ominous Hummmmm…”
I would go for
Weapon of Mass Distraction
I’d go for some slightly longer version of my current Location tag; something like “On the road to Armageddon” or “One hour from Armageddon.”
And switch my location tag to actually give, y’know, my location.
In fact, I may end up coughing up the dough and doing that 
I wasn’t gonna, but now that my left arm is in a cast…
Yes, but are you mugging people? Inquiring minds want to know.
Okay, then, “…all I got was this custom title”