I've never worn designer jeans as most jeans look much the same really once they are covered up
- but - of course I have no waist that disappeared long ago (!) and I am also very short ( 5ft 1 ins at the last count) - so mine are all low waist and fitted, narrow leg which I think is the most flattering, and wear longish fitted T shirts or tunics over the top. I don't buy any garment that has a waist where the waist once was!
I usually have to cut something off any jeans that I buy and sew them up again or else have the crumpled up around the ankles look - which seems OK with some jeans and works with boots in winter!!
For me M&S always seem to over compensate on the waist and never fit me properly - but we are all a different shape!!
Hurdity x