I think I ranked both Owl fights as 1 and 2 on my list? I'd need to go back and check. I like the one on top of the castle because he's so underhanded and you can't use any of your tricks to really get an edge on him (he doesn't use perilous attacks in that fight, so you don't get free posture damage off of mikiri or dive kicks and the like).
And then I love the fight at the estate for the same reason you said, it's just a bare knuckle brawl with katanas.
Also the music is killer in both fights.
Although I’m totally okay with Sekiro not having an online component, I kind of wish you, Floyd, and I could play it together. Maybe we should get on Bloodborne or DS3 sometime in the near future.
I was thinking this exactly yesterday. Like it wouldn't even be the same game, but I can't help but wish I could play Sekiro with somebody (I have it on PC, though, so that would present difficulties anyway).
I think I could do a Bloodborne or DSIII run at some point if y'all wanted to.