Not answering for NoOkie, but I share his/her sentiment regarding 737s vs regional jets. Even with the CRJs being 2/2 seating, the lesser diameter of the interior as a result is just cramped feeling. One plus about flying SW into/out of OKC is that if you're lucky then you'll be on a half empty 737 -- so much room! Or back when I flew weekly for work, I got lucky once on a 6:45AM OKC-LAS SW flight and there were about 10 of us total on the plane.

So even if the seats are all width/pitch comparable to one another (and why wouldn't they be when its a race to the bottom to squeeze as many people onto a single flight), the "breathing room" does affect some of us.