Actually FB is mostly fans on there... because they all added me before the introduction of the "Page/Like" system. It annoys me because I don't want all these people in my feed lol. Twitter is a combination of fans and people I have similar interests with..... G+, I think, can be everything. I already have pretty populated circles of fans/music industry people, family, friends, acquaintances, android friends, etc. I can see myself starting to use G+ as the main place and then sharing certain things with Twitter. We'll see how it goes really but it's the most impressive service I've seen.