A long time ago, I had requested a username change to Hi, but later went with Kharg because usernames must be three or more characters; at the time, I thought it was a XenForo core restriction, but thanks to being a staff member on a XenForo forum, I discovered it's an option. Admin CP -> Options -> User Registration -> Username Length Limit Not sure if that was already known or not, though. Anyway, I agree with having a limit on maximum characters, but I don't believe there should be a limit on minimum characters. For example, Christhor's current username C is one character, which is from back when we were on vBulletin. While usernames like Hi are silly, there are more non-silly ones, such as Ed from Ed, Edd n Eddy. Thoughts?