I like the wavy too but with a light gray grout.

Wavy for sure and I agree with the light or medium gray grout.

Wavy! With white grout. Lovely kitchen, btw.

wavy. with white grout. looks cleaner, simpler without being dull

I have Berwyn on my (enormous) island and love it, and I’m going to disagree with everyone... I’d pick something with some sparkle to highlight that in the quartz. Glass, maybe a crackle...

How about the large format tile in a stacked layout?

Definitely wavy with white grout. It's not the "star" and you do not want to draw attention to it.

Without question, the wavy tile. Beveled won’t stand the test of time. For grout, go with a pale gray to complement the counter.

Another vote for wavy. Keep it simple!

You have a beautiful countertop with a lot of movement, grout color close to tile color to blend in with tiles & to keep it from distracting or clashing with countertop. Keep the BACKsplash in the BACKground by keeping it simple.

Wavy with white grout

wavy tile. I'd use a pale gray grout. otherwise it will look like a white sheet on your wall. you want some delineation.

use Mapei Warm Gray, Silver or even Frost (shown below)

btw, I love the Agora Piastrella tile w/Berwyn

You have a great counter. Don't let the grout lines be a competing pattern. White/matching grout.

wavy

The one on the right with warm grey/tan grout. It’s very pretty

Wavy, with pale gray grout. I personally used Mapei Frost and am very happy with it. Just enough contrast to subtly delineate the tiles.