After carefully analyzing both my Facebook Friend’s List as well as numerous others, I think I have figured out exactly how Facebook chooses who to show on your Friend’s List.
4 of these “friends” stalk you
3 of these “friends” stalk you, and you stalk them right back! (mutual stalk-age)
2 of these “friends” you stalk on a regular basis
1 of these “friends” you recently talked to.
So, I’m guessing you’re skeptical. Go to your Facebook and look at these 10 friends. See if these categorical breakdowns work for you. Let me know!