I had an empty 744 F cabin on HKG-SFO a couple weeks ago so I was able to try out all of the seats I haven't selected in the past. I felt that 1A/1K to be a little bit narrower than the other seats- not sure if it's just in my mind or if it's actually narrower, so take of that what you will. Sat in 1A for take-off and landing though, at the right angle you can see straight ahead which is fun.

IMO for a couple, the sweet spot is 2A and 2K. Normal width seat, not too far away from each other, PTV facing you even when stowed (so you can see the map during take-off/landing, and keep the map displayed during the flight without needing it to be deployed).

As others have mentioned you can't see the other person in row 1 when seated anyways. Take a few steps over to 2K if you want to chat, it's good for your veins