TLZ
Banned
Because I am 100% sure I want to use Full/Normal at all times.
Don't want to question whether 'auto' got it right.
I also have a feeling some games don't respect the setting, Ground Zeros being an example.
In that case I feel like setting PS to Full but the TV to limited will give me a dark image that's more appropriate for the night setting of the game. But maybe that's just me.
Having PS4 on Full and TV in Low should give you a washed out image though, I think. You'd want to have both using the same setting.