there are no "rotated or counter-rotated" spins in snowboarding. its frontside and backside. we already had the Tony Hawk generation come along and fuck up the naming of FS and BS sliding so lets not go down that path with spinning. you spin frontside or you spin backside.
one may be easier feeling for YOU but spinning both directions is different for different people. when i was learning to land switch it was easier for me to spin backside and land looking up hill because i tended to wash out my heelside edge on FS 180s
potato potato tomato tomato.
if you wanna do a 180: bend your knees, wait till youre almost off the lip and turn your shoulders. your legs should follow.