In your opinion what makes a person interesting?

Over my many years of life I have heard the term used of others as well as myself. Someone would say ”She is a very interesting woman”, or ”That guys is quite interesting”, I have once been told by a woman that I was interesting. But what does it truly mean? To some it is a polite way to say that person is odd, without saying so. To some it seems ”interesting” lends to the person lived a life or is doing things the person who finds them ”interesting” wishes to do or has interest in. Still, others seem to use it to say the person they find ”interesting”, is someone they want to know more of. To you, what is a catalyst that causes you to view them as ”interesting” and what finding someone interesting means for you?