It's good to have a dust cover to keep your table clean when not in use. When using, do some blinded tests and see which you prefer. If you can't tell the difference, then play records without cover so you don't have to bother with it when changing sides.
Ok guys
My question is this, nothing major, more of a curiosity. When playing an album does it make a difference if you leave the dust cover up or down? Probably stupid question but hey there are lots of opinions out there