Something I would like to have happen in canon:
Coulson: “Ms. Foster, we need your help.”
Jane: “Oh, Mr. Coulson, I wasn’t aware that SHIELD was still interested in stifling scientific research in the name of militaristic supremacy.”
Coulson: *gives Jane an odd look*
Jane: “What? You know I don’t like SHIELD–”
Coulson: “Oh, no it’s not that. It’s just… people usually call me Agent Coulson. Maybe Director Coulson on a good day.”
Jane: “Funny you should mention that, because people usually call me Dr. Foster. Maybe Nobel-prize winner Dr. Foster on a good day.”