depends on when, where and for what.
Smallies in the spring I slay em on red eye leeches and schultyzs s3 sculphins stripped through their holding spots. In the summer they hit great on boogle bugs, stacked hair frog divers and murdich minnows and dragon flies. Falls program is back to streamers swung slowly through runs.
Carp we knock em dead with Mulberry flies in the springish time, rest of the year small minnow streamers, carp darts and other locally tied carp flies.
Steelhead is def a senyo AI. Caught way more steelhead swinging an AI then any other fly for steelhead. If I carry a dozen flies for a day of steelheading 8 will be AI's of different colors etc. Rest wil likely be a couple of intruder style flies and a couple of steeches.
Salmon by far come on egg patterns during the day and at night they come on bueter crytal bullets and some real simple streamers (black bunny strip tied on a #6wet/nymph hook like a diachi 1550, with a small dubbin head). Those take litterally 30 seconds to tie apiece and will kill em at night.
Small trout I do good on elk wing caddis, BWO's and various other mayflies, hoppers (late summer) and small nymphs and streamers.
Unicorn Brown trout! gotta go with tommy lynch's drunk and disorderly deceiver, a circus peanut or a mad pup. Gotta throw "meat" to catch the big un's.
If I just need to catch a fish or if my daughter is with me I tie on a Tequilia streamer, basically a fat wooly bugger with yellow and blk marabou tail, copper catcus chenile body and yellow crazy legs. great high volume catching fly.
J-