I used to do quite a bit of dry fly fishing in the rivers of eastern Washington, Idaho, and Western Montana. Loved to camp and fish from the banks and take a nap along the shore during mid day when they weren't biting.
I tied my own flies, caddis, drakes, hoppers, etc. It was a great hobby at lunch time when I worked in a Boeing cubicle. Eat a sandwich, pull your vice out and clamp to the table edge and tie a few. Had a good friend that should have been a guide instead of an engineer for a day job.
We floated the Yakima several times with great luck. But mostly I enjoyed bank fishing and wading. Learning the rivers is key. Knowing how to read the water, the 'pillows' and dropping your fly (not that) against a grassy bank for best presentation to the fish became an art form.
A great hobby while soaking up nature, but like golf, I have found it too time consuming. Can't wait for retirement.... I have so many hobbies, I will probably be busier than I am now!