Having spent the majority of my life in Texas - spending significant formative years in Houston, college plus a few years in west Texas, and now living in central Texas - you run in to Rangers fans. Most of them are alright. Good people who just like their hometown team. Salt of the earth.
But jeebus they're annoying as hell. There's a stereotype at work, as well. It was sooooo coincidental that their fan base exploded right around the time they made a couple of deep postseason runs. That's what happens when a team that wasn't terribly good becomes really good in a short period of time.