I prefer to be called Cheza irl as well. I don't specifically ask people to, but most of my friends do it anyway.
I've got no issues with my real name, but usually only people I'm not particularly close to use that, or it's something more official.
So I guess that's why I prefer Cheza. It feels more "personal" when people do that.
I even have a necklace with a C on it. My real name doesn't start with a C, so people who don't know tend to get confused.
Yay, secrets.