[swozey]

I never understood the point of twitter until I started following journalists, professors, lawyers, etc. I still wish Twitter had Google+'s circles feature, so I could group those (along with engineers) and flip between them. I don't personally want to deal with multiple twitter accounts.

[detaro]

Twitter's list feature might help you a bit to get that, as might the tweetdeck client.

[Palomides]

twitter private lists more or less allow this, for following at least