I am voting Missouri mainly because of my experience with it and none of the others except Arkansas. Missouri is unique, it offers wild small stream born trout, tailwater trout, lake trout, put and take trout, and pay to fish trout. Not many other states offer so many ways. Missouri offers Rainbows and Brown trout, and just south of the border you can find Cutthroat and Brookies if you want them. The scenery on some of our streams are second to none and the fishing is year round.
I have fished Illinois, Kentucky, Tennessee, Alaska, and North Carolina for trout. None really compare to what we have here in the Ozarks.