Centering. I won't even bother with the other aspects of the card if it doesn't have eye appealing centering first.
That's such bs,you going to throw out a 90/10 Mantle that looks pack fresh? Centering is important for grading purposes ,it's not art to put framed in the living room with a big white strip on one side. You going to put a damaged painting on the wall with bad corners ? NOT! I've graded big rookies with off centering and perfect corners,edges and color.
Cards come out of packs off centered, not manhandled and roughed up.
My pet peeve centering is way over valued.
My rant for today.