My ideas
I think this is what we should go with in black
I like the simplicty of this
Like the grey finish, large tiles, less grout to deal with. Like the minimal feel with suitbale shelves into the wall, would want the shelves on a slight decent so that water runs off te tiles. Like the shower head in balck but want a bigger head Not as bothered about a shower door, larger glass side but the floor to be wet room set-up.
Like this bench set-up
Q