While I can appreciate the take of a Wulff in fast water, most of my dry fly fishing is done on slower runs and slicks with smaller flies. For this reason, I prefer the parachute style for its incorporation of a visual aid. Sometimes I even tie them with a hot pink or chartruese post for low light. The fish don't seem to mind.
Mayflyman, you might earn the title of "Site Pollster". Good topic!