after reading Bob Boese's article this week, I wondered how many people use scent on their flies and what you use.

I confess, I have! And for many of the same reasons Bob mentioned such as covering human scent while tying and cover the scent of synthetic materials. Like Bob said some effect the action so I try to choose scents that are more liquid. I want to try Bob's recipe but so far have not been able to find the ingredients. My opinion on this issue would probably be different if I did not fish solely warmwater (not many freshwater trout in Louisiana) and usually using a popper-dropper similar to what Bob described several weeks ago.

your opinions?