Twitter had something called "lists" that let you categorize and segment what you follow, but they've deprecated or hidden it sufficiently that I don't use it anymore.

With the Twitter feed, I get this random spew of stuff that I can't categorize. It gets useless quickly, and I have better things to do with my time than curate twitter.

I love the basic product, but Twitter is a clueless company that needs to die so someone can replace it.