No to the grey - your wall seems to have a green tinge in them, so I would say either green/grey or a warm white tile with darker grout. If you choose the right grey/green, it is a classic look so shouldn't date. If you are a bit scared to choose colours, why don't you get a couple of warm white sample tiles and put where the splash back will go. You will soon see if it looks too stark....(maybe another idea, but possibly not a good one - why don't you see if you can put a few pages from a blank sketchbook in the whole area where the splash back will go (not super white white, but a warm white). That could also possibly highlight how stark (or not), the white may look. I can see what design tank is saying, as your cupboards appear to be more cream than white in the photos and if this is the case, then I agree the white will most likely look too stark. My cupboards in kitchen were white (but a warm white not a cool white). The stone bench tops also have the little speckles of stone in them..I can't remember the colour Ocean foam/Osprey.......but even with those colours and them not being cool whites, I thought the white tiles looked too stark against them. I therefore went for a glass splash back and ever since I then went to think of designs for my bathroom renovation, I constantly regret going with the glass in the kitchen and modernising the house too much..........definitely don't do glass if you are wanting to keep a classic charm to the house. In a long winded way, I think yes, I also think you should just stick with the grey/green. It will make a statement. Not the right shade...but another example....it may be hard getting the colour of the tile exactly right given that the walls are already painted and the tiles need to match.

I like the longer ones best. If tiles are your preferred choice, I think a white tile that has a nice polished texture look, looks great in a kitchen. With great lighting, the light bounce's of the angles and the stainless steel appliances at night and gives a bit of bling and expense.

My subway tiles are hand made Spanish tiles. I don't know what you mean by textured artisan tile?? I have used white grout. Our home is nearly six years old, and the grout is still white. I always rub a cloth over tiles if I have used the cook top. Keep it clean after cooking, and then it can't get dirty.

Hand made subway tiles, with a gloss finish would also look wonderful. They have an undulating surface which bounces the light around, and will give texture and even more interest to you wonderful kitchen. I really like the colour of your cabinets.