Eh, society and the media explicitly and implicitly tell us who is to be considered attractive. For example, if I was going to make a rando vn game, in the second to last screenshot - I'd choose the two dudes on the left as characters. I'd do so even if I personally found the two the right to be more attractive. This is because I've seen enough romance options in commercial games and from those romance app games to know who and what is preferred. And even though that's me responding to the audience, it's also a reinforcement of who's meant to be attractive. Kinda a chicken or the egg scenario.
Generally, I think introspection is good even if you don't plan to change yourself. I have a pretty good idea of why my tastes are what they are - it's not simply random.