I've recently stopped advertising usual Polish as it's just not getting booked enough to warrant the costs of buying new seasonal colours.
I used to love selecting new colours for my kit, but without the bookings to cover costs it's big business loss, when you calculate x4 seasons of new colours per year, maybe the odd few more and then barely no one booking it.
This year I've reduced my kit to basics like black, white, gold and a few other popular colours for those who like a mini manicure after a removal of gels, and in case of any other request though other than that it's just too much of an expense to be sitting around doing nothing.
Gel Polish is extremely popular, through client feedback because its dry straight away, it's very shiny, does not need to be thought about for a long while as there's 2 weeks wear in it.
I added a small selection of toxin free nail Polish for since that's been asked for a fair bit, especially by mum's to be, if more call comes in for that will add more colours.
Almost all clients who used to have a regular mani are now gel mani clients, aside from one who alternates between the two based on removal needs.