I use my real name now, Waldemar, I used to use Jackson though . For female I use Jessica.

Usually Delphin or Dezl, or if female Dolphina, but I sometimes go for a name that I feel fits the character or just sounds cool. Most of the times if there's a default I'll leave it as is.

Think this one was done recently... I keep defaults where available, otherwise:

For Fantasy RPGs Karios for male and Kiriana for female

More Sci-Fi stylings Daniel for male and Julie for female

Alexander is my male character name in RPGs. That's my son's name. But he's recently started playing RPGs and be uses the name so now I name them Fenton. Female characters I name Alexandria (wife's middle name) or Bree (daughter's nickname).

Usually Quake or Unreal(female character) every games.

A family man. So adorable

Sal. I did name my character in X "Shane"... it just looked fitting.

Vergaser

Damn, pbroy, do some sleuthing first!

And since I'm lazy, I'll just copy/paste my answer:

Wright. Whenever I can.

There are exceptions, though. Mass Effect, for example, has already set the avatar surname, so it's weird to have him called Wright Shepard (doesn't sound bad either). In these cases, I use Kyle for men and Erica for women.

There are some other obscure examples. Bloodborne has such setting that I felt compelled to be more creative. My first character was called Dorian Wright, and the second one, Amadeus Nox.

Whenever I'm set to make a very evil character, I like to call them Jack; I roleplayed some time ago in a Angel vs Demon forum, and some user had a character by that name, and he was the most sadistic monster of the bunch. It kinda left an impression on me, and I like to honor him by giving his name to my avatar. Most notable examples, my Fallout 3 Evil Karma PJ, or my unethical Grey Warden in Dragon Age.

My pawn in Dragon's Dogma is called Syra, because it reminds me of a close friend. She used that name when roleplaying. 

If I have to imput a complete name, and the game encourages to use my own, like in Metal Gear Solid 2 and 5, I use Damián Wright. My real name plus my favourite surname of all time. (it's kinda my artistic full name at this point).

There are more, but those are the ones I can think of right now.

I usually stick with the default but if there's no default then just V.