I need to see the chouces but IMO too many different finishes in a bathroom are never good. I like 12 x24 porceleain tile on the bathroom floor , shower walls and tub surround and the same color but smaller on the shower floor. Then a counter with that same color in it works with everything else. Walnut toned tells me nothing.

If you show pictures of your vanity, floor tiles and anything else you've decided on, you will probably get more help. How about a plain white quartz with no veining? I recently helped my Dad remodel his home, and we chose a stained vanity cabinet (clear alder), and a 12 x 24 floor tile that was in the gray/beige color tone. Since the floor tile had a little bit of a stone look to it and slight movement/texture, we decided to go with a totally plain white quartz counter with absolutely no veining or movement. IMO you have to choose whether you want movement in the floor OR the counter, but not both.

I agree with Patricia that using the same 12 x 24 on the floor and the shower walls looks great. My Dad chose white subway for the shower and it still looked good though.

Whatever you pick for the counter you should repeat for other horizontal surfaces such as shower curb, bottom of niches if you any, top of pony wall, windowsill, etc.

Good luck!

Here's my Dad's bathroom:

Beautiful! I agree, pictures help but neither the cabinets or tile are installed yet. Your advice on movement makes a lot of sense, thanks so much!