How would someone go about changing his user name? I no longer like mine.

if post count doesn't matter just sign up as new member, it is not like your doing what larry, Gutshot and others have done.

Go to edit profile and change it. It won't take effect until Rick approves it though.

look for this about halfway down:

Display Name: (Appears with each of your posts.)
Changes must be approved by an Admin. (3 - 24 characters)

I can say that my life became a lot less stressful when I changed my name from Lee24.

I tried changing mine to PeterDragon, but it apparently didn't make it past the judges.