So I just started thinking that there's different roles to each of the ships. Like who's dominant and who's submissive in each one. 

Mari x Chat: Marinette is submissive to Chat's flirting, because c'mon, who wouldn't submit to a model in black cat leather?

Lady x Chat: Chat is submissive to Ladybug's control, because he would simply do anything for his lady

Lady x Adrien: Ladybug is embarrassed because it's Adrien, so she's submissive while Adrien lets the Chat out 

Mari x Adrien: I feel like it would be awkward between them at first, but I think it's shared dominance? But it's mostly Adrien who's making the first move in all cases.