I was talking to a buddy of mine who's a guide here and head of our local club the other day. We were talking about how crazy things have gotten with flies (we both tie) and he made a crack about how if his clients just carried an assortment of Adams and nothing else they'd probably catch more fish. It's really more about presentation 90% of the time anyway.
FWIW, I carry way too many flies and never know what the hell to use.
2002 Lexus Land Cruiser (LLC)
2002 Pleasure Way Traverse Class B pop top van
2001 GMC 4x4 2500HD EC, LB
2007 Nash 27-5B fifth wheel