I like Twitter because I can follow interesting people and celebs such as Darth Vader, Stephen Fry, and Christopher Walken. No spam. No ads. Not enough character rope to allow verbosity. And the tech people I follow can tip me toward stories I would never have thought to read because I don't have access to their knowledge, their inside contacts, etc.
If someone starts twittering about their breakfast, their medication, their cat phlegm, their anal temperature and crap, I just stop following them. No time for such nonsense. Thus the people I'm "following" are a small group, not minions.