I identify my self as an "introvert", and I would say that I have pretty good social skills. Part of that I work in a school where I have to talk to teachers, students, and administrators all day for hours on end. Eventually, I just learned how to do it effectively, and I've come to like socializing, especially with interesting people. Which leads me to my point.

What I found was that despite me having fun and being confident in talking to people and interacting in group activities, there's just comes a point in my day where I literally just don't want to talk to anyone. Socially (and even physically, albeit to a lesser extent) speaking, I'm completely and totally drained. It becomes almost painful to engage in conversation that I feel isn't too useful or too interesting. And honestly, I kinda want to be left alone so I can just gather myself. Sometimes I need a day, sometimes a week. But ultimately, at some point I need time to recover from the social stimulation of my day.

From my experiences, I think that's where a big divide between introverts and extroverts exist. To the extrovert, when an introvert gets into his/her shell so that they can recover socially, it appears as if they may be aloof or bored with you, when in fact, they're just tired. This is especially irritating with friends who constantly ask me if "I'm okay" or if there's "something wrong". They don't understand that I'm comfortable with silence and for large parts of my day I actually prefer, and it has nothing to do with them.

Also, just a side note. Something I found quite funny is that because I feel that I'm an introvert and had to struggle with social anxiety through my teenage years, I now feel like I have to overcompensate in social settings, so I'm generally the one who leads a conversation and pushes it forward. I wouldn't be surprised to find out that there are others who also do this.