WELCOME to my world! For YEARS I had the longest wire (is that a 3?). My old audi seemed to think it was the best for me. But the dang wire NEVER fit the curve of my ear, and as it attached to the speaker, it stuck out so far from my ear canal that I could’ve hug a skirt on it.
My new audi swapped this for a shorter wire that does indeed force the BTE up to the top of my ear, so I also get LOTS of hair rustling - so much so that I even resort to LIFTING the hair straight UP in the hopes of putting some space between that and the mic (usually to no avail).
The shorter wires altered the sound quality of my aids by a noticeable - but slight amount! I am very nuanced in how I hear things with the aids in, so I noticed right away the sound quality was a bit thinner. Even so!!! That goofy-looking loop of wire no longer stands out from my ears! The wire fits so close to the side of my head, that I don’t even see it … well, until the speaker works its way backward out of my ear canal. And that goes on 100s of times all day long. 
In a perfect world, our audis would be able to CUT and shape the wire to our individual needs. But no! The hearing aid WIRE WORLD has just 3 standard lengths, and we all know that HA wire can not be bent, shaped or tamed in any way, shape or form. I guess I’m just grateful shoes are not sold in S, M, or L only.