We have just moved our kitchen sink from under a window to facing a wall as we needed to knock through into our conservatory. I have to say, so far I don't mind it. I loved the view out of the window, but I hated not being able to clean it very easily.
Corner cupboards, the base unit one, especially ones with the rotating shelving units. Awful, awful things. Hid dirt in the base that you can't get to, lose tons of space behind, and lose various items when they wobble off as you turn it?
Wall cupboards in a corner. Really hard to try and get things in the far corner.
Wall cupboards that go to the ceiling. The top shelf is too high to be able to reach easily without a ladder. I'd rather a top shelf I can reach, and then either a boxed in section, or just the top left open and have to clean as and when I remember.
I am hoping when we redo this kitchen in a few years, we will be able to have no wall cupboards, or only ones for glasses and more display type ones, and just have pan drawers and inner drawers to those for utensils