This IS a pseudonym actually. So probably Beck Nicholas...
=)
Why... well Beck is what I'm called usually anyway so it's kinda my real name. And I'm scientifically published under my last name so that's like a different side to me. Nicholas is someone i adore's middle name.
If I had to choose a different name altogether I would still use Beck of some sort because I can't imagine answering to anything else. As for last names... It has to matter. Cos if i get to choose I want it to mean something. And sound okay. And not spell out something offensive.
What about you? What matters to you when choosing a pseudonym? Does the name have to link to your family/life? Can you answer to a different first name (am imagining all those signings in my future)?