Man who cares about looks honestly. As long as the villian is badass and powerful as hell.
I love them both but Yhwach is just more impressive. And l bloody love ruthless villians and Yhwach is that.
Aizen cool he has the swag, looks, charismatic, smart, fresh but he just not that ruthless, he likes to play around too much and he is very cocky, arrogant and over confident. lm glad that ichigo facepalm that cocky bastard haha.