So many bathrooms have no tile on the wall and they are just fine. It is less expensive, so you can save money.

I say not to worry about easy-cleaning. Go for the looks as well! Also, since there's no photo, what color/type of vanity is now or going to be in your bathroom? That helps to decide as well, not just factoring in the floor color. So for the bath area I'd suggest a painted wall. Leave the tile design for the shower (if you have one). Nowadays the paint is very durable and especially designed for "moisture rooms" - the paint won't crack or peel and it is developed so it's easy to wipe off the wall with a damp rag and there'll be no damage made to the paint. If all other colors are solid and overall the bathroom is NOT too busy, then pick the subway tile with the marble-streak detail. This is if you still really want tile wall around your tub. Otherwise, choose paint.

In our small bathroom upstairs, we put white subway tile all the way to the ceiling around the tub (with shower), and all around the room up until 3-4’ or so. There is a small decorative border on top of the tile matching the marble floor. I like the look, and I feel like the tile helps keep the bathroom clean.

This is the vanity (not using mirror as I need it to be a medicine cabinet). I'm also going to use the hexagon as the backsplash for the vanity (and shower insert). The floor is a bit greyer in real life

I like paint

We have found that clients are just tiling the floor and the shower area...about 90% of the time.

Really, how dirty are you going to get the walls. It's not a public washroom. Just paint the walls and change up when you get tired of it.

How long will you be staying in the house? If I were to redo a bath, I would tile all the walls from floor to ceiling because of the carefree maintenance. Who wants to spend their time painting (or their money to have the painting done)?

Trish, here is a couple of pictures of our bathroom just to show the tiles on the walls.