Since starting fly fishing over 20 years ago, I honestly feel that my fly fishing has improved due to observing others as they fish and the following are some of what I have observed and my thoughts:
I have noticed that there are many fly fishermen that only fish the fast water sections of a river. They fish the fast water and then get out of the river and walk the bank to the next fast water section. There are not many that want or enjoy fishing the slower and deeper pools between the fast water sections. That is fine for me because I enjoy fishing the pools and feel the larger fish will be holding there and have had good success fishing these deeper pools.