I don't have much to add since I have only fished in Missouri, but a college friend of mine lives in Helena, MT. Moved up there 10 years ago. This is what he says about Montana.
"I could not possibly fish all the streams within 2 hours of my house in a lifetime. I fish streams I don't even know the names of. I can fish in solitude, fish spring creeks, tailwater's, lakes, freestone streams, and cast to fish in backcountry areas that have never seen a fly. The opportunities are endless. I live in the place I would want to vacation to the most. My kids walk to school without fear of crime. I live 5 minutes from the office. It is a much slower pace of life. The people are independent, but friendly (except if your from California!). Summers are perfect with the sun rising early and staying light until 10. Can't beat that for a full day of fishing. Family and friends love to visit. I am surrounded by people who love the sames thing I do. I still feel like I am on vacation."
I think fishing locations are really about personal preference and what you desire from the experience. It is probably different for everyone and I would bet it is not always about the fish, but the total experience you have while fishing. Most of the reports I read on OAF always have an element of the report that is telling the true story. Maybe the title of the thread should have been fishing experience rather than fishing locations as I think that for most of us the total experience is what we are looking for.