Scrapdog-
1. Thanks for your service.
2. Did you ever fly an RJ? Methinks not. Of course there's a bunch of airplanes that are more fun to fly (a 1975 BE-58 being one of them, or an old Stearman or Cub), but in the world of future beer cans flying ma and pa from A to B, the little jets actually are "fun". I could do lots of things safely and legally in an E145 that wouldn't work in bigger jets.
3. I have no doubt that an F- anything is 200 times more exciting than what we do for a living now. Again I am grateful for your service; on the other hand you should be grateful for the opportunity to go fly something fun on weekends. Those of us without that opportunity choose to find our "fun" in flying our jets precisely, smoothly, turning off the toys and eye-balling it in, etc. It's not necessary to constantly remind us that it's not Mach 2 with our hair on fire; we already know that.
4. I don't know what Delta you've been riding on, but I find them to be neck and neck with CO for aircraft cleanliness, quality of product, and the like. They also chose to put some padding in their coach seats, unlike any CO seven-three I've ever ridden on. YMMV.
To the OP: I'm at JB after leaving top 25 percent seniority at RAH. JB is probably best classified as a near-major, and I'm commuting to reserve on the "express" airplane (in-house joke for the 190). It's still loads better than the regional was for me, mostly for the reasons already listed (jetways, live airplanes when I start work, working for the brand instead of contractor, etc.). That's with acknowledging that the overall compensation here still has room for quite a bit of improvement. Good luck in your decision.