Usually I have a hunch of "so they're this?" when I see a shippable thing. Once I observe their dynamic in series, at some point the switch clunks to "oh yeah they're this!!" and it doesn't budge from there :^D

There's some other factors – How I see their dynamic as lovers, preferring them canon-age and sweet (a lot of the mobrei I've seen is aged up and dark undertones), loving Mob topped by anyone, squicked by Reigen bottoming for anyone, etc. Do I like reimob because of my biases or do I have the biases because of reimob?🤔