Personal preference and confidence again are the main factors involved when choosing a fly. I like TallFly do not have a lot of confidence in hairwing flies. I have caught more fish swinging leech patterns than any other. Then again people laugh at me for swinging caballero eggs patterns as well. Both I know are effective and I have caught many a fish on them. My MOAL leeches are two to three inches with two pieces of flash. There is a lot of movement in them and I find that most if not all takes are very aggresive. I do use hairwing patterns, but have little confidence in them. I can count the number of steelhead on one hand that I have caught with them. Cutthroat and salmon are another story though. I find that steelhead that are in fresh water for longer periods of time do acclimate themselves to their surroundings and will take dab patterns like a burlap or spade, hence why dead drifting nymphs or swinging nymphs can be very effective in the summer. Larger flies will pick up the aggressive fish and smaller neutral patterns presented appropriately can take the more lockjaw fish. Finding fish in that appropriate mood is all part of the game. I have caught Eastside fish on both, but do see the point that working a run first with a big fly may put down some fish.