Roof racks make cars look SICK! Not to mention how easy they make things when it comes to packing the car up. No folding down seats, no water in the car, no overfilling, no "Sorry dude theres only room for like 3 people in my 5-seat car".
For people with 5-seaters, a ski rack is essential. It basically lets you use your car normally, instead of having you find ways of cramming in 6-foot long pieces of equipment, and all of your other gear AND all of your friends.
All of you seat-folders have to jump on the wagon here. Once you go rack, you can't go back.