My dream shower (next house) is no enclosure at all, just an entirely tiled bathroom with a drain in the floor near the showerhead wall. I would have a tiled “seat” along the wall and a between-the-studs recessed niche for shampoo, etc. Something like this:
https://i.pinimg.com/736x/e3/19/ad/e319ad5814d08a454ffe5c2f1a3032a0.jpg
