I took up boxing to channel my energy and it's the best thing I've done for myself. It hasn't made me more aggressive. In fact, I am much more serene, balanced and disciplined. If I don't have gloves and I am irritable then I punch pillows or my mattress. Or skip rope or run for a bit. Basically I try to do something that requires my body to move. I paint and play piano and guitar but I find that only helps me in my depressed states.