There are so many tiles that would look beautiful in your kitchen. If it were me I'd love to add some subtle color. I think white subway tiles wouldn't really add much to the aesthetic of your white kitchen.

I would say you need something way snazzier than subways! :) Your kitchen is bright, but a little...safe? How about a pop of color? Or maybe some subways with a strip of accent tile in a great color? That said, I'm not one of those that "knows" all the tiles so I don't have a bunch of images to share...maybe someone else will have something!

I with the others. I would add something that brought color...even subtle color.

I think tile down to the counter would be a lot nicer/the U shape lends itself to a wonderful backsplash-have a search on houzz for colors/patterns that you like. Infinite choices out there,and it will give some punch-the kitchen is nice but quite plain. do you have under cab lighting?