I agree! Go for what you love. Down the track at resale time, if you feel it's too dated then, there are many splash back materials that can be applied right over top of tile. Is it just the area behind the cook top that will be tiled? I think anything will feel like "too much" at first if you've become accustomed to how it currently is. It's like when you paint a room. It can feel overwhelming at first until you begin to put furniture and decor back in place. A simple way to trial colours is to tack up some wrapping paper, fabric, contact paper (backing left on) or whatever you find that has a colour you think could work. Try use things with different sheen/gloss. Even paint a board and prop it there. Leave for a few hours and see what does and doesn't work for you.

I think a dark grey grout would look great, the wider the gap the more the tiles stand out, if it wouldn't cost too much and you had some spare tiles you could do a mock up on a piece of board , sometimes the only way to really gauge things is to actually see it

It all depends on your other choices. What colour/type of cabinets, benchtops, flooring, lights other furnishings in adjoining rooms etc. Can you give us more detail?

Hi johnstoneanne , using Copper as a splashback gives you a couple of things to consider where what material you choose may also depend on the actual look you are after and considerations such as its maintenance, it being fit for your purpose plus that of your budget and to meet the regulations for this if you have a gas cooktop. There are a few ways you can go to achieve a copper splashback; starting with use of actual sheet copper laid onto a support substrate. This is a soft material that can scratch easily and will also oxidize and so you may like to consider applying a clear two-pack coating over this metal during fabrication. Another option would be to use a Laminate material that has an actual thin Copper face layer which also comes with a clear protective coating. You have already mentioned using a Copper tile as an option; where this will also have grout lines. Another option you may consider could be to use an easy to clean glass splashback and use a metallic copper finish backing or if you want an aged copper look, then you could alternatively use a copper photographic image that is printed onto the back of the glass splashback. A glass splashback would be easy to clean, scratch, heat and water resistant. There is also the possible option of using large sheet Porcelain splashback in a rusty copper colour if you are after a more matte finish; using something like perhaps Neolith’s Iron Copper or perhaps their Coreten, where these are heat & flame proof, water and scratch resistant and easy to clean & again eliminates Grout lines being a large format sheet. I hope this is of some help, regards Malcolm.