I like FB mainly for interest groups I'm in."
True, but I tended to find the posts repeated themselves over and over again and the comments were more like "great", "nice picture", "wow", etc. - very superficial. I also found the groups were huge, like 20 000 in one group (or at least 8 000) and then it's like a small town but most don't post. It doesn't feel cosy, it doesn't feel like a personal conversation between a few people.