Screen display on DVD players.

How many turn it off?
I have turned it off before but I started to understand that if the display bugs me, the movie isnt very good :)
Need to add "when listening to CDs" and 'any improvement'. Tks.
I never heard a difference when shuting off a cd/dvd display until I got my Pioneer DV79AVi universal player. When you shut off the display, video output, and digital out there is an impressive audible improvment!