Not easy to guess what makes the difference between a S/S I enjoy to listen to and a S/S I run away from. In my experience, a good S/S is able to (and mostly does) write about experiences and feelings of others, that have been told to him/her that s/he has read about and not only about personal feelings. The basic ability is being able to listen and to feel with someone else. In a pair of words it's the difference between passion and compassion.

Wolfgang