I prefer renpy because of rollback and skip but I also want CLEAR text boxes! I'm not against other engines as long as they have skip and rollback. Its just a quality of life thing.
Art style is big for me I love variety and girls that look a bit different like light of my life or teenx's art. What I hate is the generic shaved big tit bimbos (and I have nothing against big tits or shaved pussies but offset them with something different).
I think I skip at least some of the dialog on at least 50% of games. The story has to be rely good for me to dedicate lots of time to reding to get to the good parts.