sockets in kitchen not hidden in cupboards. When DC falls in the chip-fryer, or water squirts out of the dishwasher hose, or someone cleaning the oven gets a shock from a faulty element, or drops the toaster in the sink, you don't want the first person who arrives to be searching behind cornflake packets to switch it off so they can touch the body.
IMO appliances are best fed from a socket under the worktop, with a switch above the worktop, in plain view, immediately above the appliance. Put sockets and switches at every point where you want an appliance, and everywhere someobody else might want an appliance, and everywhere some wierd person might, one day, want an appliance, including high-level outlets for cooker hoods, extractors and wall lights.
Sockets in other rooms should be fitted 450mm or more above finished floor level, which is the standard in new builds and only looks odd if you are used to them tucked away by the skirting. You will find them much easier to operate if you ever become old, or fat, or pregnant, or get a bad back or knees. I recommend a double socket within a metre of every corner of every room, with another half way along every wall, except in larger rooms where there should be one every two metres. A high level sockets above working level for desks, dressing tables and workbenches.
Remember internet cabling for PCs and smart TVs, coming together in a cupboard where you will put your router, possibly under the stairs. Run cable in conduit which makes it much easier to change, replace, or add to tehinstallation in future. Cables runs must always be directly horizontal, or vertical, from visible switches and sockets to give you a clue before you drill or nail into them. Never in diagonal or curved runs.