I saw your tweet considering the value of twitter. I didn't have a good response for you. I have always used Twitter for thoughts that I wanted to vent but didn't think were purposeful enough to share with actual deliberate people. Either that, or were so shallow or snarky I didn't want them "out there" (a la facebook). My profile tagline is, "most of these are drunk," which has been more and less accurate over the years, for sure -- but the point of that kind of tagline is primarily, now, to discourage anyone who might read my feed from taking it very seriously at all.
As a result, though I remain on twitter, I absolutely don't defend it as a bastion of intellectual or even invigorating thought at all. I find most value in it for purely social uses -- that is, I find more value from following friends' tweets and seeing what inane things they have to say and vice versa -- and I certainly don't mean to apply that just because I find the "most value" out of that piece of Twitter doesn't mean it is truly a very valuable component.
In other words, I almost support you leaving... ;)