The “my fluther” features is most useful for keeping track of questions certain people have written, and pulling their profile up quickly to write them comments. If you don’t have a lot of comments for someone, and you’ve never read a question they wrote to know whether or not you’re interested in their questions, I don’t see any point in adding them. I wouldn’t consider it an insult if someone I added did not add me. For example, I added ‘gailcalled’ because I pretty much adore her. She didn’t reciprocate. In fact, her fluther is empty. That’s okay with me. I don’t think of it as a “my friends” list, but as a “people whose questions i am interested in” list.