It depends on several factors for me..
When parking on level ground after a long / hard drive, I will put the vehicle in neutral, ensure that it doesn't roll on it's own, then put it in park and leave the hand brakes down for the brakes to cool / not warp rotors / burn pad material unevenly onto rotor..
After a short / easy drive on level ground, I use as little hand brakes as possible to keep the vehicle from moving before putting it in park.
On hills, that's an easy one..
