Back when I was in high school, and they were new, I actually liked the coupes better. The shorter length behind the doors really accentuated that loonnnng hood, and I thought those "wings"/"flying buttresses" extending on either side of the rear window were really cool and exotic looking.
Fast forward 40 years, and many '65-'70 Mustangs later, I had a '73 Mach 1 fall into my lap (the car in my avatar pic). By that time, I much preferred the sportsroof style, so it clicked with me immediately. After all of those previous model, smaller cars, the '73 felt so much more comfortable, rode so much better, and with the Competition Suspension, handled WAY better right out of the box. I was hooked...but man, does the view out of that mail-slot rear window suck!
That car came and went, as most of my Mustangs do, but the '71-'73 body is definitely in my blood now, especially for a guy that drives all of his cars. A couple of years went by, and when I came across my present Grande', I couldn't help but jump on it. All the style and comfort I like, much more reasonable bottom line, and I can SEE out of the rear window, too. It's not as sporty, or perfect, or impressive as some of my previous Mustangs, and I may someday decide to get another Mach, but for now, I'm really enjoying the heck out of my "little" coupe!