Here's how to choose the three badges that are displayed with your profile:
Select to View Profile from your navigation drop-down.
From the grey sub-navigation bar below your personal information, choose the More menu and select Reputation.
Where the row of badges appears on the right, click the disclosure triangle.
The row of badges expands to display the Me in 3 interface.
Remove any badges you no longer want to display, and drag new badges in their place.