Found an annoying one. Kind of a disappointing pain to have to make sure before I move the camera that no buildings are selected. I use a computer mouse with my left hand, so I always mirror the default WASD controls so I can use the keyboard with my right. That puts L as move camera/dragon left. I sold at least a dozen buildings in my first skirmish before realizing that L is already hardcoded as the Sell selected building key.
