I believe we are creatures of feedback. Listening to the horn and feeling it's feedback is highly influential to how I play the horn.
My flugelhorn gives me a rich buttery feedback so I do everything in my power to fill it with puffs of air that allow that buttery sound to float. I back off on the attack from the dark feedback my Martin Committee gives me to enhance the soft darkness of it's rich tone.
HOWEVER, with all of that said I truly believe The Harrelson is a chameleon. I get to control the sound on that horn that will then determine the feedback that horn gives me. I can make it sound like a flugelhorn, create an airy throaty sound, snap on a Harmon and produce the same Committee textures of Miles Davis, or peal the pain off the wall when playing lead. Control... I love Control!