Some good info above. DO NOT go helos if you want to be an airline pilot. Your helo time is basically a cool story on your application and not a whole lot else. Yes, there are RTP programs, but if you want to skip the regionals and go to the bigs, helo time won’t help much (exception of JB).
I personally thought the E-6 was great. Granted, I am four years removed from the community, but Boyd’s description above is spot on. The highs aren’t very high and the lows aren’t very low.
You will get plenty of hours there and hopefully a good flying follow on job that you can segue into an airline job.
I still live in okc even after I retired...it’s a great city and an easy commute to an airline job with cheap living, plenty to do, and great people.

I would caution you to not listen too hard to a few broken toys in VT land. We send some good folks there, but we also send some of those who aren’t too happy with the community and who didn’t perform well.

Talk to more than one person. All of the communities you listed have good and bad parts.

I was a VT instructor for 3 years and I understand the dilemma that students go though making choices. In the end, though, the Navy mostly chooses for you. If you have a good attitude and can fly reasonably well you will do just fine wherever you land.