I lean both ways, as I play a wide range of bores, and quit honestly, the bore is the last thing I was thinking about when I got all of my horns. Very little if at all. In fact I find the real ability to embellish notes comes from the mouthpiece. I have a rather small bore Kanstul flugelhorn 0.421, yet can color and embelish notes better than on my large bore 0.460 Getzen flugelhorn, primarily as a result of a very deep french horn tapered Flips Oakes 3 WT that I use on that horn. Man you can spin air, hold on to it and whisper sweet nothings into the air puff before letting it go into the horn.