Our apartment is perfect for my partner and I as we love monochrome, soft colours and grey! The owners before us loved the red and black combo so added a HUGE red glass panel stuck onto the black caesarstone splashback as a feature. They did something similar in the bathroom over marble (gasp!) and in the study they replaced the inbuilt black wooden desk with red wood laminate. As it is super expensive to replace marble and caeserstone it is something we can't do right now and have to live with it. I tend to block it out of my mind... It's horrid.

Your mockup scheme is similar to our master bathroom we just completed - photo below. I know you mentioned storage being a concern - our mirrored cabinet has offered an amazing amount of storage in a very small space and also helps bounce light around. I was worried about black taps etc too so we kept chrome fixtures but added in a matte black candle and black potted orchid to create a similar effect which we can change out later on. Our floor tiles are dark but because they are semi-polished they actually bounce around a lot of light and don't make the room feel dark if that is a concern. We also have a huge fiddle leaf fig in the corner (not pictured) which adds a really nice feel to the space - a plant like that could help bring in the outside greenery in your bathroom. Instead of the storage tower you have to the left of the vanity could you do say some floating wood shelving, possibly with baskets added for more hidden storage? You could also bring in the 60s theme with what you displayed on there eg. photos as you mentioned? In regards to the window - a previous house we lived in had a window at about shoulder height in the shower - as well as letting in heaps of light it was amazing for storing toiletries etc!

You should also take into account your own height. If you are shorter than average consider having it lower. The most used oven should be the easiest to access. Think about the height you can comfortably and safely lift a heavy roast, which should be the height of the mid-shelf of your higher oven. Never have it too high so that you can't lift out heavy oven trays in a safe and controlled manner. Best of luck with your kitchen Dr Retro of Dr Retro House Calls

I have just moved into a new house where we designed a kitchen/scullery very similar to yours - kitchen for preparation and cooking while being part of the household and the scullery for dirty dishes and storage of crockery and food items that are used occasionally or for sandwiches and snacks (little preparation). There is also a drinks area just outside the scullery (with a very small sink and a tap that has a choice of ready hot or chilled water - it is used constantly). The fridge is placed in the middle between the main preparation kitchen and the scullery where the toaster is also kept. People wanting coffee, toast, snacks can access everything without bothering the person/ people cooking. Our hot plates and wall oven are separated by an L-shaped bench with a single sink, which works very well. However, the sink is much closer to the oven than the hot plates which was bad planning. I underestimated the number of times I move between the sink and the stove top (including rinsing my hands between tasks). The sink needs to be close to the cooktop - and, because you are not stacking dirty or drying dishes there, the amount of bench space between the cooktop and sink does not need to be all that large. One other thing that I am really glad we upgraded to is a synthetic stone bench that is allows you to put pans on directly from the oven (most do not) - brilliant. It also allows you to cut directly in in. I usually don't do this, not because I ma concerned about the bench top but because I dont want to blunt my good knives :)