What Makes a Texan?

I have a friend who lives in Georgia. She recently purchased a house there and, when sending out her new address, said that she was going to miss being a Texan, but they were Georgians now.

Kristi's aunt and uncle grew up and lived in Kansas all their lives. Last year, they purchased a house in Texas (just barely - it's on Lake Texoma, just about 200 yards from the Oklahoma state line). The house is a part-time residence. They come down on weekends and for a week or two here and there, but I would say that their main residence is still in Kansas.

And then I have a friend from college who was born in Texas and loved most of his life here, but hated it. In fact, within just a couple of years of graduating, he moved out of Texas.

So my question is - which of these is a Texan? The one who would love to be in Texas but has to live somewhere else because of her husband's job? Or the family who wasn't from Texas, but chose to set up a house here. They didn't get here as fast as they could, as the saying goes, but does it count that they came? Does it matter that part of their decision was for tax reasons? Or the guy who was actually born here - the natural born Texan - but wanted to be someplace - anyplace - else?

So who's the real Texan? Discuss.