There are a few other threads that can help you out, kindly note that the 77D F cabin is the exact same as the 77A layout ("D" vs. "A" difference is in business class only). Long story short, 1A/2A are enjoyed because they share aisle access and nobody else has that aisle (1D/K, 2D/K share the right aisle). I might add that the privacy could be disturbed by the occasional flight (J and Y) attendants who seem to prefer the A-side aisle when walking forward. Personally I prefer the window seat, however, I know people who swear by 2D/K because they're slightly farther from the galley, and enjoy being able to poke out and talk to each other and you can kinda see one another (you're across from one another, while in 1A/2A you're front/back. Downside to D is that it's not a window if that's important to you). Personally my favorite on 77A/D is 1K, for no real reason except I like the feel of it. I don't like looking at the wall divider behind seat 1D when sitting in 1A.

F galley and lavs are forward, and behind row 2 are only biz class seats (no galley or J lavs). So in theory the row 2 seats are slightly quieter.