2 has me pretty accurately.....I almost always wear headphones, more or less for those exact reasons, I can be talkative and engaged, charming and outgoing with others, when I am in the mood, or a situation demands it, but I'd mostly rather be on my own. Obviously, we are layered individuals with many parts, but this is a pretty on point brief description.
Since I was a little kid walking to school, I had my headphones and my discman or a tape player, I used to prefer walking home from school, just to be be on my own for a while and zone out ith my music......in high school the same thing, I had dozens of friends and contacts in high school, my friends were the 'popular' crowd, and so was I... but I still walked around listening to music......