Unless I'm mistaken, neither Starwood or Hyatt have a hotel in or near Midland. Of the "majors", that leaves, Marriott, Hilton, and Interncontental (Priority Club) hotels as possibilities. So you really only need to compare those three chains.

Marriott has a FFI, an RI, and a CY in Midland. Hilton has a full service Hilton and a Hampton Inn. And for Priority Club there is a Holiday Inn Express. So with that in mind, you have some choices.

First, lets look at Priority Club. PC's strength is that there tends to be one everywhere and you can earn points extremely fast. Also, elite status is extremely easy to get and maintain. But the downfall is that you don't necessarily get very much with their elite status either. Quality can be somewhat variable at some of their hotels and they are much more limited in the FS and Luxury area. So if you are looking for a program that has a lot of nicer resort options to choose from, this may not be your top choice. Another possible issue with PC is that you only have one option in Midland. If they have any "stay" based promos, you can't hotel hop between two hotels to maximize that type of promo (at least not with staying directly in Midland.) That could limit your potential point earnings possibilities.

Hilton has two properties. So it would be possible to hop between hotels to maximize any "stay" based promos they might have. Also, it looks like only Hilton has a FS hotel in Midland. The problem that I have had with Hilton is that their FS properties can be extremely variable in terms of quality. I have no idea whether this one is a "good" FS property or not. Hilton has fairly good hotel coverage overall. Their mid-tier hotels (like a Hampton Inn) tends to be pretty nice. One plus Hilton seems to have is that their top level elites get free breakfast just about everywhere and all the time. So if that is a major factor for you, then you might want to look a little closer to Hilton.

You can earn a decent amount of points and they do have what they call "double dipping" by giving you airline miles if you choose (though my understanding is a lot of their elites tend to choose to get extra Hilton points rather than the airline points.) It seems that Hilton may have somewhat recently (i.e. within the last couple of years) had a major devaluation of their points and program, even more so than the other majors like Marriott or SPG. Personally, I've thought a couple of times about trying them out again, but when I read about the issues with their program from the threads in the Hilton forum, I've decided to stick with Marriott and SPG as my primaries and PC as a secondary.

Marriott has three options in Midland. Just like with Hilton, this will allow you to hop between hotels if you get a "stay" based promotion. If you stay at the CY, you won't get free breakfast as an elite, though a lot of them seem to have breakfast in their corporate rates now. So I have been getting breakfast in a lot of my recent stays. I personally like CYs and as a Plat, I've been able to ask for and receive suite upgrades on the vast majority of my stays. So if you like having a suite room, this might be your best option (unless you want to get fewer points and stay at the RI.) As mentioned by others, RIs will only get you half the points of the CY or FFI. I tend to stay at RIs on awards (more room) and stay at Marriott's other properties to earn points. Newer FFIs can actually be very nice hotels. You will get a free breakfast everyday of the week there and still get your full allotment of points.

Marriott's points program tends to shine the most for those who can earn a lot of points (i.e. in the 200,000 and up.) Their Travel package awards which come with 7 nights in a hotel and upto 120K airline miles is possibly the single best hotel point awards out there. But you have to be able to earn the points. One benefit of Marriott is that they don't only focus on "points". They offer elites Buy-one night, Get-one night free certificates a couple of times each year. They have "bonus buck" rates that can net you $25/$50/$100 toward your room bill.

Marriott has the most stringent elite requirements (75 nights to reach Plat). They also don't provide breakfast to their elites at resorts or on weekends at their FS properties. But Marriott does have a life-time elite status that is a great opportunity for business travellers that have a lot of years of traveling ahead of them. (Note I'm a lifetime Plat member myself.)

Just how many nights per year will you be traveling? If you are traveling 100+ nights a year, you might be able to achieve and maintain top elite status with two programs. I do that and it is very helpful when it comes time to plan out those family vacations. Having points in multiple programs gives you the ability to be more flexible have more options to choose from.