How selective are warm water fish?

Does the type of fly make as much difference as we might think?

If properly presented in front of a willing fish, does it matter if we are using a Woolly Bugger, Clouser Minnow, Zonker, Goldie, Boa Yarn Leach or any other similar fly? Will any of these similar dressings draw the same reaction from a fish if presented to them?

I have only about 18 months experience, but I have been wondering about this. It is my guess that the type of fly is not that important. That location (including depth), the activity level of the fish and presentation are the critical factors.

What do you think?

Regardless of the answer, I find tying to be a very enjoyable pastime and enjoy learning and tying new dressings. I would hate to spend the rest of my years tying Woolly Buggers only. But...does the fish really care as much as we do?

Thank you for your thoughts.