Thx. Well, one thing is common here that I too have a lot to say on many topics and one common denominator (either Facebook or Twitter or whatever) is not a suitable choice (hence I use different platforms for different topics but I know its not totally effective).
It's an ideal concept to sort various different interests of a single person interest into separate containers based on target audience. I think Google+ came close but their naming policy sucks. I wish they'd allow different identity/per-Circle, which could help resolve this issue. But in perspective, I should be able to target my audience based on their interest as I know best and vice-versa. Twitter is totally ineffective here to most degree.