Good Morning!
Yesterday a Facebook group I'm a part of did a "Twitter follow" for members to like and follow other members of the group. One thing came to mind as I was looking at some of the other's websites was how the individual authors dealt with their twitter account. Some were interesting and I was happy enough to follow...others were...well...just self-promotion. Over and over they tweeted their book covers and filled their tweets with hashtags for exposure. I would say that tweets can have an element of self-promotion (mine do) - but they should display the writer's interests beyond their own particular book. That's how you join in communities and find like-minded individuals. If someone follows and all they ever see is the same book cover or tired self-promotion, the tweets are not doing what you want them to do!