There's a thread for avatars, why not usernames too?,

Mine's pretty obvious, i couldn't think of a clever username so i went with an SCP, and 500 was the first one that came to mind, no idea why.

Well mines is based off my MLP OC Pure Sparky. Who is an alicorn.

Well, me brother came up with it for me for a character on World of Warcraft. And since then it's kind of stuck with me.

Pie is tasty (especially apple pie) so I put this.

i dun cri evritim

In all seriousness, my username in fact means 'don't cry'. When I came up with it I pronounced it as 'cry-dawn'. How I came up with it I don't really remember but when deciding on a username I felt it was the best choice.

Well, it just suddenly popped up in my mind; although I was kinda thinking about plants at that time (hence the -troph). I have absolutely no idea where the 'auto' came out though.

My last name is Moore, and i just put the Dr. in there for no reason

I came up with it on the fly. Have no clue why I chose it, but I did.

Bennings is a character from my favorite film, The Thing. Pretty simple. Chose Bennings over the other eleven names because A) it's associated with the film, and is't common like Childs or Palmer, and B) it just sounds cool.

Oskar is really just... My name. Then, I've just added "-PL" as refering to fact, that I'm polish.