People complain about the absence of clear indicators of "flirting" lines but for me, the biggest problem is no separation between explorative choices and those that end dialogues. You might have a bunch of questions on the screen, but sometimes depending on the order you click you can either get all the answers or NPC will simply end the dialogue after choosing one particular question.

Baltazar and Nightsinger scene, for example.

Sure, "Attack" is an obvious dialogue end but sometimes you can learn more but have to ask in some hidden order. Would love that explorative lines to be labelled somehow. Different colour, maybe?