Just play with the pattern. Experiment. Tie a bunch of them up just a bit differently and keep track of what you did with each one (use different color thread for the head of each one and take notes) and see what happens. Try and angle in some of the materials kind of like a propeller when you tie your flies.

If leader twist isn't a concern or a problem then play with spinning flies. Hey, you may lose a fish or two to a fouled leader but then again you may catch the only fish of the day because they wanted a spinning fly.

There are no rules in fly tying, just make sure the flies are legal within the law book for the body of water and have some fun.