To me dry flies are much easier to fish than a nymph or streamer. Fishing a dry fly is a two dimensional challenge of presenting the fly and eliminating drag, while you can see the fly. Nymphs, wets or streamers add the third dimension of depth in the water column and often not being able to see the fly.
So what do I fish? Most of the time both a dry and a wet or nymph. It would probably 2 nymphs if I liked using strike indicators.
Hal, its interesting that you brought up this topic. An advantage of meistering the trout fly swap is that I get to see all the flies. I've been noticing that they are ~ 90% sub-surface.