The days are long and the years are short

My perception is that the stats come from interests, as do being unique and herdlike. Friends comes from number of people on your friends list. Relating to people is either based on how many of them you've friended back or on how frequently you lock posts, and writing style is based on most recent post. I was commenting above (albeit not overly clearly) on writing style, which was the only thing that changed when I reran it after a fairly conventional post.