pinniped

My $0.02: I do not believe is it poor etiquette to slowly recline in narrowbody F. I usually do it, and I do not object if the passenger in front of me does it.

I consider it one of the benefits of F. I'm 6'4", and I can't recall any discomfort from the person in front of me reclining. There are some old-style long-haul J configurations where it gets a little tight when everyone reclines, but it's still okay: you just shimmy out of the seat if necessary; I completely expect that everyone will recline.

I don't do it in Y except in the specific cases where (a) everyone is doing it or (b) there's no one behind me.