I personally think my user name is pretty self explanatory 
but was curious about (most) everybody elses.
My whole user name should have gone like this, but it was too long:
The Great, The Amazing, The Wonderful, The Almighty, and, gosh, let’s just say it, The Humble.
Sometimes I amaze even myself.
Self
Proclaimed
Overlord
OF
Earth
When Y2K rolled around I was chatting with a friend over what a disappointment the year was going to be (this was probably about 1:45am 1/1/00) since we didn’t live on the moon or have flying cars or laser guns or anything. I made the impromptu comment: “When I was younger I imagined that I would have a futuristic name like ‘Jimmy Quasar’ and fly around in my spaceship. Now here we are. Where is my goddamn spaceship?!? Hmm…hey, that name is pretty cool!” and thus history was made.
Bitten by one in the wildlife rehab center.
Just a little bite, but for being such a tiny owl, damn it hurt!
Azazel backwards.
And I just thought you were a big Jackie Gleason fan. One of my favorite lines “You left enough. . . .”
Hmmmm, maybe I should my username to Omega Six or something.
I was a big fan - still am - of Optimus Prime when I was a kid and one day I was playing with my friends some 3d shooter (I think it was duke nukem 3d). I was “Optimus” and another guy was “Seppelhut”. One time I couldn’t make it and to honor my fragging skills, he renamed himself to “Optihut”.
I totally loved that name, as it is unique, and exchanged my nickname, since there are thousands of Optimuses around, but only one Optihut!
However, people in chat always ask me whether I am an optician…
I chose my name BEFORE the Alias tv show existed. I wanted something that sounded like a cool name, but was somewhat clever, so I chose Alias because it sounds neat and badass, AND it’s an alias. Get it?
Bo Diddly
I have no clue where my name came from. Woke up one day naked, with a rubber ball in my mouth, hands tied behind my back with a silk scarf, and NoClueBoy tattooed on my ass.
Kind of embarrassing, too, as I was in the store front display window at Macy*s (Herald Square).
Named after the James Bond movie of the same name.
For a similar reason I am always tempted to go with “unique”, as it is a unique name 
NoClueBoy… Ouch! But funny
Because people tend to dread my presence, and I am an unholy terror from beyond who will one day, When the Stars are Right, rise from the depths and devour you all.
When I started Mudding about 12 years ago I wanted to be Mysery like the chick in the stephen king book. That name was taken and I tried a bunch of others and they were taken too…
So I was pretty miffed about the whole name process and grabbed the little book on my desk from Super Mario and settled on Tanookie … I figured who the heck would name themselves after Mario’s raccoon suit?!
Well eventually the name grew on me and I kinda like it now and when chatting on the mud everyone abbreviates it to 'Nookie which is kinda cool too 
So whenever I sign up for stuff I use Tanookie (although sometimes its taken these days! grrr)
My given name.
First, a rooster was raised in seclusion, to insure that it was a virgin rooster. Under a full moon, it was killed and it’s blood was collected in a tupperware container, and then thrown away ('cause it’s kinda icky, you know) then it was gutted, and its entrails were strewn on a large platter. As I gazed upon the pattern they made on the platter, I decided to mail the guts to a far-away telemarketing firm. After about 7 days of fermentation in the warm confines of the USPS, I figured it ought to be quite ripe.
Then I cooked the chicken in the oven, roasting it slowly. Nine hours later, reminded by the smoke detector, I remembered that something was in the oven. I threw out the over roasted rooster, and asked my buddy for an obscure HHGTTG character name, and there you go.
To be honest, I made up the part about the rooster, but it’s a short story without it.
I wanted a handle that sort of sounds like a real name at first, but really isn’t; one that might have a backstory, but doesn’t; and isn’t actually interesting enough to spark inquiry about its origins.
I think I nailed it.
I started BBSing when I was almost 15. I’d been reading a lot of Heinlein. In his books, Hamadryad was a secondary character. She was mind-bogglingly, brain-numbingly beautiful and didn’t know it. Since I definitely didn’t feel that I was mind-bogglingly, brain-numbingly beautiful, I chose the handle out of both irony and a kernel of hope.
Also, I’d been reading books on Greek mythology since I was 8. That didn’t hurt.
(As a side note, my handle is old enough to vote.)
it’s the name of a weezer song that suits my life.
I was listening to Hüsker Dü while trying to come up with a good name.