The kind of content Niko makes u probably need to have confidence on steroids...u haven't watched Niko's content much specially the Biggest Menace Series so. He's like that when the cameras are off as well.
I think Sharky would not be number one for the simple idea that when you watch the Box video where it was picking up a girl he literally did not want to do it
On the introvert/nice thing, i think you can definitely be intoroverted and nice. I'm introverted but go out of my way for people all the time, i just dont say it or point it out, i just do it.