Happily married 20 years this July. I've never shopped for clothes without the lovely Mrs Pete. I have absolutely ZERO fashion sense. If I've ever looked "good" in something I was wearing, it was my wife's fault. :-) Given the choice, I'm in jeans and a comfortable shirt. When I travel, I have to go over shirt/pants/tie combinations with my wife beforehand to avoid major colour matching disasters. She often jokes about sewing "geranimal" tags in my clothes so I can match them without help. I wish she actually did it - would make life much easier.
Clothing and cars are, for me, strictly utilitarian - something you have to have, but not something you need to get all worked up about.