First world problems, for sure! :-D

I've sat in every one of the window seats (1,2A, 1,2K)

Had 2A once and didn't like it as much. There is some sort of dirty laundry bin in bulkhead behind 2D... with the access door located in the mini-cabin. I found that it was opened and closed constantly throughout the flight and the click/slam seemed to echo in my suite. I'm not really a headphone guy, except when watching movies. And the click/slam would even permeate the headphones and invade the movies!

1A feels very private, but I found the FA's often chat in the open area, near the restrooms. Not loudly... just a murmur... but enough to be distracting as I trying to read/work. Not a huge problem, and I often select that seat.

I actually like 1K. Of course, you'll hear a little galley noise during the food prep times, but it seems far less than the laundry door click/slam to me. And I'm not a "push the call button" guy, so I like being close to the galley because it's quick to pop my head in to ask for things.

Quite frankly, I think it's hard to see a huge difference between any of these seats. I've never sat in either "D" seat, but I cannot image it would make a huge difference. Yes, it's not a window seat, but how long are the window shades open anyway?