I stopped using Twitter because the conversation became unbearable. Certain themes pervaded the service, weaving their way through just about every conversation.
It wasn't a case of "following the wrong people" because, suddenly, just about everyone became the wrong people.
Along with the ownership aspect, Micro.blog gave the opportunity for a new start, a clean break, but I now find myself unfollowing people there as the same conversations start to dominate certain parts of the feed.
Yes, they are important. Yes, they need to be discussed. But everywhere? All the time?