Keep it simple my friend. Just pick a number and make it unique. I'm 226 west Texas, because that's my birthday. 2/26
A lot of people go this route. I can tell you that I don't care for long call signs when working dx. I heard a station recently, he was RCT-1239. It took him 3 times calling out before I got all of it. So again, keep it simple and unique.
You're close to Waco??
Edit: if you're talking to another country, yes you can use the country code. 2. There are several other ways as well. "State side" is one I've heard and use as well.
@BC Coyote needs to chime in here. He would probably be more help than me.