I used to interact a lot more with FAs when I sat in 15 G or H on transpacs, especially the one who sat in the facing jumpseat.
Now that I mostly sit downstairs with the masses, either in C or Y, I hardly have any interaction on trans ocean segments. The best seating I find these days is rarely facing a jumpseat.
Once in a while I strike up a conversation about cool places to go in Asia or, of course, optimized shopping. This can be like the threads here in FT, though, where you end up having the same conversation over and over. And it's only if you run into someone like a FA who's in the Air Force Reserve that they may be mildly interested in hearing about how to get a share taxi in Phnom Penh.