Unfeeling emotions
One of the things that I've heard most in my life is my lack of emotions, or rather my lack of empathy.
This results in most people viewing me as your average "logical", "rational" or "critical" minded person, wherein every conversation or debate seems like a formal proceeding in a court of law: no emotions, just facts.
Though in fact I had an almost opposite view of of my own self, shocking as that may seem. Overly emotional and unable to control them, going from short-bursts of anger to being over affectionate (puppies ofc) and sometimes, or I would say most of the times, overwhelming people around me.
This may seem contradicting, and any mention of this by me would lead people to think that either of those views of my self is wrong. (Either people are, or I am), and I would disagree
Both of those views are correct. While my internal self and external self may seem conflicting, I would actually put it under the umbrella of having intense emotions and living at the opposite ends of the spectrum, going from seeming overly emotional to seeming completely emotionless.
Is this an advantage ? The obvious answer is that it's impossible to decide which personality traits are advantageous in our modern society, as that would require us to define what having an advantage even looks like, but if it's genuine happiness, I guess I have it :)