Well, I quickly follow people whenever I see an interesting post. Then when I see posts which don't really interest me appearing on my wall I unfollow the authors. You must have wrote something interesting so I followed you and don't often spam with rubbish so I don't unfollow you :)
I try to keep it fresh and down to one post per day, sometimes two. This entire time I've been here, people still don't know what to expect.