Oddly enough, I enjoyed Far Cry 5 even though it followed pretty closely the same formula. Something about the game really stuck out to me, while 4 and 6 were horrible in comparison imo.
For some reason I couldn't finish 6. I've played them all and enjoyed most of them but something about 6 just started feeling a bit repetitive about halfway through, and my interest kind of died out. (which is weird considering the mental trauma of climbing radio towers repeatedly in previous ones.)