I personally do not like pleats (on myself) because they widen an area of me that is already wide. It’s that simple. I think they look ok on other women, but they are never my favorite — my personal distaste for the look on my own body pushes me almost into poison eye territory, but as Angie says, I always support the preferences of the wearer! When I do like the look of pleats, I tend to prefer them on pants that are not tapered.
ETA: this is in response to FI’s comments about pleat “haters” — and I also avoid the other looks mentioned because I’m super picky about adding more volume to my lower half unless the look is somehow balanced out with a perfectly fitting and flattering top. This is a big-hip-people problem, and I know some of you can’t relate, but it is akin to people with broad shoulders avoiding shoulder pads and puffed sleeves. Of course some people don’t mind emphasizing parts of their bodies that are larger or not as proportionate, but that is not me.