Gee to think I like it for the ability to keep the line close to the water casting under trees, and to throw a curve into the line by the fly.
Years ago I got a reprint of a series of his articles in On The Water from George Roberts. I don't know if it's in the video, but one picture from it sticks out in memory. It showed a forward cast with the line going up on an ~ 5 degree angle from the horizontal when casting for distance. Just one of those things thats stuck in the memory over the years.
Other than that I can only think of one of Leftys rules that the entire line has to be in motion before you can cast it. Maybe with a vertical stroke your not straightening out the back cast before starting the forward stroke?
Last edited by John Desjardins; 05-12-2003 at 10:59 AM.