One thing I used a lot in AW (I know I must have used it a lot because I keep trying to do it here), was the keyboard key that automatically switched between 1st person and 3rd person (obviously to a preset 3rd person position). I know we have the mouse wheel to do that - and I like that and wouldn't want to lose it, so this would be an additional keyboard option.
The reason I used it a lot is because I like to be in 3rd person when running about and mining but in 1st person when hunting. So if I am mining in an area with mobs I frequently need to quickly switch between 1st and 3rd person, and using the wheel is a bit cumbersome for that.
Cheers,
Q