23 Signs You’re Secretly a Narcissist Masquerading as a Sensitive Introvert

source: Scientific American/  Scott Barry Kaufman | August 26, 2013

♦  I can become entirely absorbed in thinking about my personal affairs, my health, my cares or my relations to others.
♦  My feelings are easily hurt by ridicule or the slighting remarks of others.
♦  When I enter a room I often become self-conscious and feel that the eyes of others are upon me.
♦  I dislike sharing the credit of an achievement with others.
♦  I feel that I have enough on my hand without worrying about other people’s troubles.
♦  I feel that I am temperamentally different from most people.
♦  I often interpret the remarks of others in a personal way.
♦  I easily become wrapped up in my own interests and forget the existence of others.
♦  I dislike being with a group unless I know that I am appreciated by at least one of those present.
♦  I am secretly “put out” or annoyed when other people come to me with their troubles, asking me for their time and sympathy.
♦  I am jealous of good-looking people.
♦  I tend to feel humiliated when criticized.
♦  I wonder why other people aren’t more appreciative of my good qualities.
♦  I tend to see other people as being either great or terrible.♦
♦  I sometimes have fantasies about being violent without knowing why.
♦  I am especially sensitive to success and failure.
♦  I have problems that nobody else seems to understand.
♦  I try to avoid rejection at all costs.
♦  My secret thoughts, feelings, and actions would horrify some of my friends.
♦  I tend to become involved in relationships in which I alternately adore and despise the other person.
♦  Even when I am in a group of friends, I often feel very alone and uneasy.
♦  I resent others who have what I lack.
♦  Defeat or disappointment usually shame or anger me, but I try not to

Some personal objections:
- These 23 items are completely independent of whether one is extroverted or introverted.
- You can be an introvert and a narcissist. You can be an extrovert and be a narcissist too.
- These signs apply, more or less, to all human beings

But it is a smart list