It was the same with me. When I made a DeviantArt account and I couldn't use used
, I decided to go with Used-the-Muse, as in Used was a muse, not "I used a muse." That continued for a little while, then came lone rider. Now I just use either gbmz or gb-mz, except on YouTube since gbmz was taken. Boring, I know, but I like it because I think it does a really stylish play on the initials in my name.