I know I'm from the mylar generation- (watched people dig through the trash after SCV used the first Remo kevlar heads in '87 hoping for a look into the future), but many classic drum sounds in the early kevlar years happened with mylar. Star, Bluecoats, etc. In the classic recordings, I love the last few years of plastic:'86 Devs, '87 Cadets, '87 Phantom, '84 Vanguard, '85 Suncoast. Crazy cool drum sounds.
I love distinct sounds from drum corps, be it horns or drums. If Kevlar works for you, great. If mylar floats your boat, sure! If I get out of the car and hear a drum line and say "Let's check out the Scouts!", super cool!