I would also add tricking to the list but with one group I ski with, barefooting is the priority. My friends and I will do few NAKED barefoot runs granted its early enough in the morning(note this lake has houses all the way around it) Also wakesurfing if we have the right setup,kneeboarding, and wake skating. Oh and my friends and I will usually budy surf behind the boat if water is too rough. We like to get creative and try to ski on different objects.