My Father never really carries a knife around when he's in the city or going to work, as a banker. But when he was working on the ranch he would carry a nifty little stag handled lockback folder with PAYNE etched to the tang - I'm told it was made by a fellow near Boerne, Texas. He actually gave me an identical folder from the same maker when I was in middle school. When hunting he usually carries a Cutco serrated fixed blade and a Kershaw Blur I bought for him when he lost the stag handled lockback (I also had to buy him another Blur when he lost the original one...).
I picked up my addiction from my Opa (grandfather) when he gave me a nearly worn out Imperial Texas Jack at the age of 4. As a farmer/rancher he always carries some kind of slipjoint made by Case, KaBar, Camillus, Schrade/Old Timer/Imperial/Frontier, Chinese knock-off or the like. I rarely see him with a fixed blade unless it is a vintage Old Hickory butcher knife or an old, unmarked hunting knife he got for Christmas during the depression (he told me it was originally a dagger that he ground down into a clip-point). He likes collecting knives but he's an old German and would never let himself spend much on one, particularly since he grew up being able to buy a new Schrade Walden for $10 or less. I am certain he just bought whatever looked best on the counter at the feedstore. Unlike my Father, Opa never lost the Spyderco Native I bought him some years ago - in fact he calls it his "Sunday knife."