In my limited steelhead experience here are my favorites:
Estaz stones - black, brown, olive
Caddis - Bright green larva, viagra caddis
Scrammbled eggs - chartreuse/flame, oregon cheese/peachy king
Blood dots - various color combos
Simple eggs - chartreuse, oregon cheese, blue
Sucker spawn - pink, cream, oregon cheese, orange
I've only used nymphing tactics so I don't have any favorites for streamers. I would like to learn though.....need more time on the water.