Interface

Trying to determine what I define to be a successful (most successful) interaction with another human being. Is it:

A. Being cordial/ polite/ friendly/ etc?

B. Being a rocking awesome conversationalist?

C. Feeling pleasant once you've parted?

D. Asking penetrating life questions?

E. Looking not (only?) to my own interests and needs, but to the interest of the other party?
F. Listening

G. Combo of above?

H. Other?