I would really love the option of having two (or maybe even more!) hairstyles to toggle from in normal gameplay without going to the aesthetician. As in, during character creation or the aesthetician appearance edit menu, be able to choose yourself 2(+) hairstyles you want to be able to toggle between on the fly.
...or perhaps hairstyles connected to glamour plates? That would be so awesome. ^,^

My character has long hair and I find myself going back to the aesthetician constantly if I want to switch from a high ponytail or showing his hair down, so I've been thinking about this for years.

I apologize if this has been a widely suggested character customization trait for a long time ^^; I haven't used the forums much.