I'm a fan of U6. That's what I'm gonna go with from now of I think. Only the second nickname is use (UNCheat). Although, I do chuckle when folks call them the Jailhawks.
I will use u6 most of the time. little u on purpose. I also like to call them dirty birds but im sure ill use little brother from time to time. u6c2 for university-6 coach-2