I suspect facial mimic plays a bigger role than we realize. And the sound of someone's voice and how they laugh. And intellect. 

 for me, the number one sign is they make me laugh 

 That's actually expensive taste, sir. Most women aren't funny. 

 yep, very expensive... usually highly intelligent and creative in some way, not necessarily theatrical 

 Mleku, checking out the girls at the bar

https://media.tenor.com/oNzRCt_XCBUAAAAM/loki-eye-roll.gif 

 You’re right! 😅