I don't really have anything intelligent to add to this discussion, but that won't stop me from putting my oar in
I originally learned bass clef. At some point in my high school years (and I don't remember why), I learned treble clef, but there wasn't any transposition and adding flats; I just started with "middle C = low Bb" and went from there. The transfer to tenor clef wasn't bad, as long as the music wasn't that hard. However, I'm currently working on a solo (2nd and 3rd movements of Derek Bourgeois's Concerto for Trombone. He wrote it with no key signature and a LOT of accidentals, and the solo part switches back and forth between tenor and bass clef. That combination of factors makes it REALLY hard for someone like me -- I would be reading and playing, and thinking, "Dang it, pick one and stick with it." Finally I went with the treble clef part -- much easier. No key signature is concert Bb, which means a lot of the accidentals disappear, and no swapping clefs around. The only problem was that there had been a really sloppy job of editing, and there were at least a half dozen places where the accidentals were wrong. But once I got that straightened out, it's a much easier read.
David Bjornstad
1923 Conn New Wonder 86I, Bach 6 1/2 AL
2018 Wessex EP100 Dolce, Denis Wick 4ABL
2013 Jinbao JBEP-1111L, Denis Wick 4AM
2015 Jinbao JBBR-1240, Denis Wick clone mouthpiece of unknown designation
Cullman (AL) Community Band (Euph Section Leader)
Brass Band of Huntsville (2nd Bari)