OK - so after all this time I'm still trying to figure out one thing....how do you change the descriptor under your "name" - from like noob to "the best that you ........."
"Custom Title" is unlocked at 4000 ARP. As a member of the Master Bronze Level 'club,' you have at least 4500 ARP so you are good to go.
Go to your "My Account", then select "Account Settings". << My Account >> At the very bottom of your account details column, you should see "Custom Title". Type what you would like to see as your "descriptor" just below "Custom Title", and your desired text will be displayed below your AWA user name. (Pending approval by the powers that be.) Easy, Peasy!