No, i was thinking of making a new one because im a bit bored of my user name too, but i thought it would be too much work, you'd have to let all your 粉丝 know your making a new account so they can add 你 again. Id just leave it if i was you...
there's no point to be honest. no one's bothered about your username, and would 你 really want to start from scratch? thin about it, 上传 all your content over again, gain all your 粉丝 again, it would just be pointless!