Before, we have unpainted raw wood paneling.... in a bathroom. There was evidence of a tiny bit of mildewing on the shower ceiling. I'm sure the space stayed ventilated enough that it wasn't too big if a concern, but we are still talking about unprotected wood in a room designed to deal with water. Also, there are two sets of lights there on the wall (there is also a main light on the ceiling), and a shelf next to the toilet. The tiny window is very cute, but also very visible to the outside world.
Before, the shelving above the washer and dryer included an over-the-fridge cabinet (probably because they had it and wanted to put it somewhere) and a shelf on the shower wall which almost makes a triangle with the ceiling. Let that be a hint as to how useful this shelf is.
Now, AFTER. I added paint. Instead of that shelf, I installed a towel rack behind the shower - out of the way, but available. The shower ceiling is sloped and so is the shower curtain rod. Before there was a standard curtain which dragged the ground. I made on that compensates for the slope - both an inside curtain and the one you see.
I added a tiny curtain for that window, removed the shelf and extra lights to make room for a second towel rack. I did away with the toilet paper holder and just set the TP in the window sill.
Finally, I removed the over-the-fridge cabinet and added shelves which hold twice the stuff. I used all scraps for this. I found enough to run the entire length and then 2 smaller boards, so I left the gap in the middle so that tall things could sit there. Still present is the GIGANTIC water heater. I plan to replace that with a tankless water heater as soon as I can safely afford it!