Well, I don't know if it's an example of poor social skills per se, but I'm often unable to say hello to a woman in public, even if they smile at me, or show some friendly gesture. Somehow I've gotten into this habit of just nodding my head when such things occur. It's like.. I seem to have trouble vocalizing or getting the words out, when I haven't spoken for a while. When I've tried, the result is sometimes an awkward "hello." So when I come to think of it, this is pretty darn bad.
As for major things, you have group socializing, where I just tend to shut down. In fact I mostly cannot stand group socializing, and yet I'm told that's often how people meet. Or otherwise, people meet in group atmospheres, which I can hardly stand either.. I think there is so much "fake-ness" in these situations, anyway.
For now I'll just say you've got more going for yourself. Graduating college would have been a gargantuan feat for me. But good grades in college weren't something that described me, because 1) I wasn't good academically past the 9th grade, no thanks to ADD 2) the social environment was too overbearing.. college is too heavy on the social aspect.. I had to fold.
Looks-wise, I believe I am average. But too thin, and "always planning on going to the gym," but I haven't done it yet.