Hey Chris, I'm surprised more people haven't replied here yet. I live and invest in Johnson County, it's basically South Fort Worth as far as competition is concerned (high competition). Good ROI's are made, not found. A deal can be made almost anywhere. I choose to work and invest close to where I live and for me it is paying off. Burleson is booming, Cleburne is on its way with the new toll road making access easier to downtown FTW. 10 of my rentals are in JCO, they perform as well as any other. All that being said, Jco is a great market if your in close proximity, otherwise there are better markets depending on what your after.
@Chris Guinn and @Chase Howard if you feel you have local questions on Texas, then just try the Texas Forum here on Bigger Pockets. It's pretty active and you will get more responses there to local questions like this. Thanks!