The change from calling it a 360 flip or three/3 flip to tre flip must have happened while I deeked out of skateboarding entirely in the mid-2000s. I can't write or say that shit without internally cringing. I know I'm wrong or, at the very least in the minority and have said this all before but yeah... Treflip is the corniest shit ever to me I am sorry. I'm getting old I know. I still love you all though.
When did you start and when did you come back? "Tre/treflip" goes back to the mid '90s. To my mind, "switch tre" is a hell of a lot more elegant than "switch three sixty flip".
Front foot influence is tricky. If your trucks are tight enough, it can be zero. The backspring effect of tightened bushings allows them to flip with just the back foot, no-comply style. If your trucks are loose enough not to exert that spring, you gotta have some front foot pressure and/or flick. Loose trucks and a lot of flick usually looks pretty fucked. See Cyrus. Quality treflips on very loose trucks are rare as hen's teeth. Max P, Stain, Mike Arnold-ish, Daewon. Small club. Other-than-loose trucks tres barely count. They really are just a pressure flip. Still can be beautiful. Especially switch. See Al Davis.