Since I have answered this question privately multiple times in just a few days, I am going to address the issue of changing user names in this community.
It is 100% at our discretion to approve or disapprove a requested change to your user name, otherwise I would spend way too much time changing user names.
What makes it most likely that I will approve a name change? If you have come to the conclusion that it is not in your best interest to use a keyword rich name but rather your own name or nickname, I am highly likely to take this into consideration.
What make is most likely that I will disapprove a name change? If you want to change to a keyword rich user name, I wouldn't hold my breath waiting for me to approve that. 
What happens if you simply make a new account? Well, since we only allow ONE ACCOUNT per user, I would foresee a time when a moderator would notice and ban both accounts.
We love ya, honest we do, but in the end, I have to decide what is best for the community as a whole.