I think when a player casts a spell it should look like Tai Chi, with fast, graceful movements, gathering chi (energy) and then expelling it in the form of a spell. Example: For Earth Wave, the player rolls their hands up the center of their body, gathering energy, then forms it into a ball, and pushes off the back leg, sending the Earth chi at the enemy. Cool, eh? (Folks who do Tai Chi, example move is from the Beijing simplified set.)