I got a white gloss kitchen from howdens, maybe two years ago? I thought it would show up all the dirt but surprisingly, it seems to stay cleaner than previous wooden and coloured kitchens because you can see the dirt immediately it's actually easier to keep it clean. There's no scratches on it, yet, and, as my kitchen is small and doesn't get much light it brightens up the back of the house. Tall cupboards at the top, smaller units under the worktops... I thought it would be a bit weird, visually, but it works.
As for floor tiles, I got big white glossy ceramic ones, grouted them grey (so they wouldn't get all stained looking too quickly) and the tiles have (chav alert) rainbow coloured sparkly glittery flecks in them! Sure, the floor is white, but because of the flecks, you don't really notice the dirt, and the flecks catch the light here and there, not total bling, but just a touch.
your worktops sounds lovely with the copper touch: maybe go for copper handles on the units? I know Howdens do a very similar kitchen to the tom howley shaker style one you posted, and a v similar colour too: I also think they do copper handles, too... might be worth a look...? copper grout would look amazing on the tiles, maybe? bring the copper element to the fore..? *you can always paint it out in ten years, when you're looking to upgrade, change the cupboard handles, repaint the units, etc... the floor and the worktop though, you'll probably keep... )
wooden worktops are a total ball-ache: they get dinted and minging even if you're a clean-freak. Granite is way better (yeah, I got the sparkly blinging granite chav worktop to match the tiles too, just because, why not).
www.hcsupplies.co.uk/product/solid-surface-worktops/simply-quartz-white-sparkle-made-to-measure-20mm