I did the same a year ago, largely agree with this, though I would note that it has been extremely useful to follow journalists (and comedy people/funny users). Specifically in regard to journalists however, I feel, just barely, that its worth it. One is able to gain a sense of what these people actually feel, away from an editorial board. Which is both enlightening and highly useful, if you actually devote time to reading journalism. Its also been very useful for organizing, as in, "there is a rally ya'll, come to such and such, like, now". More than once I've missed emails or other communications that would have pulled me into an action, meeting or other event but saw references to it on twitter and was able to make it at the last minute.