Smooth is always best.

I always vote smooth on wall texture.

Thank you for your thoughts. I will probably use a knock down given the more humid environment of a bathroom. It will be much easier to clean.

Just curious, why would knock down be easier to clean? In my experience the easiest surface to clean is always a smooth one. Dirt collects in the indents of a non-smooth surface.

Smooth. But I am assuming you feel you are not able to give a smooth finish DIY? We did our kitchen ceiling, and though I did end up having to go to a massage therapist (stiff neck), LOL, would do the bathroom that way again for sure! (much smaller area, and so much easier to wipe clean!)

Anything except smooth is a PITA to clean.

It tears up the sponges and dirt just loves to hide in the texture.

The only way to clean texture is with a suitable brush to scrub.