I always have it open with nothing because it is faster. One other thing I also do is prior to setting this as my preference, I delete all animation frames and leave it at "1." This is helpful when saving poses as it doesn't prompt you to include the empty frames.

Poser 2, 3, 4, 5, 6, 7, 8, 9, 10, Pro 2014, 11, 11 Pro