I would go with Virgil108. While I like the one that I have now, I realize that it's a bit long.
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I suppose after the mention I better answer the question - The username was the least of my problems with my old @KDA20 account - It had just become too high profile for me and I like the quiet life so I wanted to become a normal user again - There were just a few small issues that I felt were being caused by being linked to being quite an active Master - I wanted to get back to just answering questions without being worried about my ranking or Xper totals and being very well known, I felt a bit of pressure to give good answers all the time - I did well in a couple of competitions and people bitched it was because I was a well known master or the opinion sort favoured me for upvotes - I also thought that people had too much faith in what I was saying,
Back to your question "Spirit Is Free" is just a lyric from one of my favourite songs "Spirit" by The Waterboys from the early 1980s.1