I have fished in many states and I would say Alaska is the best fly fishing I have ever done. However I really enjoy dry fly fishing and Alaska would not be at the top of my list. The South Houlston in Tennessee is without a doubt the best dry fly water I have experienced. Some of the western states can come close but the SH has a Sulphur hatch almost daily from May through October. Also caddis and a splashing of other Mayflys make this a dream stream for fishing drys.
What is your favorite stream?