There are people in this thread actually surprised others are voting for butt sliders and not unlocking au ra horns from the face, despite only a percentage of the playerbase actually being au ra (admittedly it seems quite a high one these days)

Butt slider would be nice, though I'd prefer they just make them somewhat fuller (race depending of course) by default, but for me more aethestician options would be the best character customisation change they could make, never mind potentially the easiest.