Naming Names

OK, so I was going to be all spiffy-like and construct a real poll about this, but I couldn't come up with any cute/catchy/snarky answers, so instead I'll do this the boring way.

I've been thinking a lot about pseudonyms and why/if people choose to use them. If I were to ever publish any of my fiction, I don't know whether or not I'd use a pseudonym. And that made me wonder - as I look around at all the writers on my friends list, and boy there are a lot of them. So, some questions:

1. Do you write?
2. If you write, do you use a pseudonym?
3. If you use a pseudonym, why?
4. If you don't use a pseudonym, why?
5. How did you choose your pseudonym?
6. Do more people know you by your pseudonym or by your real name? :-)

Curious gnomis are waiting with bated breath for your answers.

L'Havdil*

Conversation in elevator between gnomi and coworker; another coworker looks on:

Coworker 1: Can you believe that "The Passion of the Christ" has made over $220 million in two weekends?
Gnomi: Well, it's all the hype. I've heard people say that the numbers will drop drastically after those going to see it because of the hype have seen it.
Coworker 1: Yeah, I figure so.
*Coworker 2 nods*
Gnomi *Thinks hard, thinks hard some more. Stumbles over shortcomings in her native language. Sighs.*: Well, l'havdil...
*Coworkers 1 and 2 give Gnomi blank look.*
Gnomi: Well, I can't think of a good English equivalent. Sort of, a comparison/contrast that is somewhat inappropriate.
*Coworkers nod*
Gnomi: So, l'havdil, as it were, the same thing happened with "The Phantom Menace."

*Coworkers 1 and 2 chuckle.*

Coworker 1: I'm not so sure Mel would appreciate the comparison.
Gnomi: Probably not.

*Gnomi contemplates the inappropriateness of using "l'havdil" in context of Jesus movie, shrugs, and heads for her train.*

*L'havdil - literally, "to separate." Frequently used when contrasting or comparing something non-religious to something religious.