Better than 81K for any reason?

Anyway, to reply to the OP, I find 81A and 81K the best because they are the most private, situated as they are at the front of the section and with the least traffic passing by. While I personally like the seats and herringbone arrangement very much, that arrangement can seem a bit like a series of pigeon holes. Sitting at the front of the row decreases that effect.

Having said akk that, the advantage over the other upper deck seats (except for those at the rear of the cabin, which can get some galley noise) is relatively slight, since they're all basically self-contained, quite private pods.

By the way, I hadn't noticed what a previous poster mentioned about the FA coming by every 30 minutes.