One of the things I've never been able to understand is why some people choose their nicknames. I've seen threads where people discuss this but some of the names I see make you dislike the person before they even say anything.
If your name is "Puppy Killer" (I doubt it's allowed) you're probably not exactly setting up a good impression. "Ih8evry1" wouldn't go over big either.
I usually will look to see the new people coming in and as much as I want to welcome everyone sometimes those type of names just keep me from doing it.
These are my own thoughts, and of course you're free to pick whatever name you'd like. I like the way this forum has taken shape, it's got great mods, and great people in it who like to be helpful. But just like anywhere else you go in life making a good first impression is helpful.
That's pretty much it. Rant over.