My first mentor was an Arabian show person and she was BIG into the English disciplines, so that's what I learned.
I quit showing when my heart horse was 10 y/o (he despised it) and took up trail riding, but I never switched saddles or learned to ride Western.
That was back when seeing someone riding in an English saddle out on the trails was an oddity. Back then (when dinosaurs roamed the earth and I rode a velociraptor) English riders either foxhunted or showed, so when I turned up at a trail ride with my saddleseat saddle, show breeches and patent leather bridle, I made quite the splash. Now nobody even bats an eye at my 'postage stamp' saddle. Of course, my tack has changed somewhat over the years even though I still ride in a 'show' saddle on my TB.