Handbook recommends you place the car in 1 when parking. One big disadvantage though is that if the battery ever runs out and you can't access it for a jump, you will not be able to shift the car into neutral and roll it.
Maserati Ghibli SQ 4
Ferrari 550 Maranello
Subaru WRX STi
I have tried parking the cc in 2nd gear and also in reverse and it has moved out of it's parking bay in both gears !
Hence, as the manual stipulates, I always park in 1st gear to stop the car rolling under it's own weight (you have been warned!)
You must have noticed the warning beeps when you switch-off in neutral?
I leave the parking brake off if the car is sitting longer than overnight as it tends to bind-on.
A QP goes to 1 irrespective what gear you are in when you switch off (N, 1 or R). It also always starts in N. Obviously there is no difference between 1 and N, until you press the gas (which actually engages the gear).
When you shut the car down in N it leaves it in N. I watched a coupe that was parked in N without sufficient handbrake start rolling away.. After that I was always sure to leave it in 1 and a good dose of handbrake.