My dad was pretty strict when I was growing up. Some of the things he took issue with:
- Wearing jeans. I was born in 1964, and by the early-to-mid 70's, girls wore jeans as a regular thing (as opposed to dresses). He HATED the thought of me in jeans and refused to let my mother buy me any. - Wearing makeup of any kind. I once showed up at the dinner table wearing red lipstick (it was the 80's), and he snapped "That looks awful."
- Having my ears pierced. I finally had them done on the quiet when I was 18, figuring that it was better to ask forgiveness than permission.
Ah, yes, blue jeans or, as my mother called them, dungerees. She refused to buy them because they are difficult to iron. 
My mother still looks at me disapprovingly sometimes when I wear jeans. She is of the era, and I was brought up the same way, that you dress up for things, such as holiday means, even if at home, going out to eat, etc. Which is fine, but I can’t tell you how many times over the years I “dressed up” for holidays etc. either at home going to friends, and the rest of the “kids” my age were much more casually dressed. I’ve finally gotten her to realize that jeans are not sloppy, and will tell her, hey, we’re going shopping at the outlets, and I’m wearing jeans.
What’s funny is I have these black capri sweatpants. Nice ones, made of French terry, but still sweatpants. I had them on one time driving the 8 hours to my parents, and that night we were going out to dinner. I was asked to “dress nicely” ad told the pants I had on were nice! I then broke it to her that they were sweatpants, but they weren’t jeans, so they were acceptable.