I notice little details too. It may be the angle, but are your tailpipes ending INSIDE or right at the quarter panels? Reason I mention this is that the hot exhaust is going to promote moisture and corrosive gases (sulfur dioxide and water- think acid rain) in the area of your quarter panel metal in that particular area and MAY cause you issues down the road in that small little area. I've seen it happen with misaligned stock exhaust. It also may allow some exhaust gases to be deflected around under the car letting them sift their way into the interior. Not saying it will, but just as a precaution, your tailpipe termination SHOULD be extended past the quarter panel edges. Not so much while it's running, but after you shut it off, gasses will float their way out of the pipes straight up out of the tailpipe. Your car, do what you wish. The symmetry looks great. But just sayin'...