If you're doing tile or stone floors work on picking those materials at the same time as cabinets backsplash and countertops. The relationships among these materials is critical. It's tough to mix different types of stone and tile unless you want your kitchen to look like a showroom.
Dark counters in tones such as black or charcoal can appear very gothic in some situations and perfectly harmonious in others. If you have dark cabinetry dark floors or other rich and weighty finishes a dark countertop will fit right in. In this example you can see that the white counter is the one that pops compared with the island counter which almost blends into the deep wood drawer fronts. If you’re going for a dark‐on‐dark palette it helps to have lots of light sources natural or added (or both). This will keep the space feeling cozy and sophisticated instead of just cave‐like.
This could either be seen as a broken U or an L‐shaped kitchen with an island. Technically I'd say it leans towards the latter but if you imagine that door on the left being cabinetry you can use this layout for inspiration for your own U‐shaped kitchen.