Note that most of my true personality comes out only if we know each other beyond mere acquaintance. INFP + Asperger's = socializing is hard.
I talk a lot more, at least, once you get me rolling. Nerdy topics are a good way to do this. But if you see me staring off into the distance or giggling during a serious conversation, it's not because you're boring, it's because something you said reminded me of something reminded me of something reminded me of something -- and you get the idea.
I'm also quite loopy. And a little dark. Deadpan over-exaggerations. Easily distracted, as mentioned.
I used to be a lot more energetic and silly, and didn't give a rusty bucket what people thought of it. But now, thanks introversion! I care a bit more. So, if we were good friends, you might catch a glimpse of just how weird I can be.
...
Oh, and if you're looking for your keys, I ate them. Sorry.