Like extra parts sticking out at odd angles? How about luggage racks on the trunks of cars? I'm going to go with a hard "no" on an erector set sticking out of my roof looking cool, but I realize that's a personal preference. The great thing about a hitch rack is that it comes off easily. I don't leave it on when I don't need it. Car keeps clean shape.At least roof racks look really cool.