Rocket Jumps; For your heavy weight character, who can't move about or reach tactical places as easily as smaller characters.
Lightweight: Falls from Parkour deal less impact damage. The main reason I would like this is: so if I'm a light character, and I already don't have much health to start with, I want to be sure I won't waste it falling.
Feel free to add your own, and talk about others ideas. Please Keep it clean!
-Eccentric Pyro