I fish soft hackles a lot. I fish them wet fly style with a down and across presentation letting them straighten and rise in the water column. I use them as a dropper of weighted nymphs fished the same way.
I also like to drop them off dry flies and fished in the film as cripples/emergers or just below as emergers.
I fish them from size 10 to 20. I have had the most success with sparser hackle than I see on most commercial ties.
They are the most versatile flies in my box plus I have a lot of confidence fishing them