Roop- My answer depends upon the conditions. Although everyone loves the visual impact of a surface strike, most of my go-to flies are subsurface.
For largemouths, a purple snake fly is dynamite around here. It has an almost nuetral boyuancy, so it can be stopped duing a slow retrieve and suspended in front of a following bass.
For smallmouths, a black over orange clouser seems to be a favorite, especially on the nearby Connecticut River. I suppose it does a decent job of imitating crayfish and baitfish simultaneously.
For panfish, especially slab crappie, the fly that I submitted for the swap (cone head bunny leech) is hard to beat. The rabbit strip tail has lots of inherent action that drives them nuts. :eyecrazy:
And don't sell your own go-to flies short. They are your go-tos because they've proven themselves and you have confidence in them, and having confidence is half the battle.