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But you're not going to tell us why you think about it very few weeks?! (I read the wikipedia entry, interesting distinctions). You're killing us here 
He changed my mind about several things. I expect many people on Twitter would disagree with his position (and my changed positions), and want to argue. And Twitter argument is, IMO, usually boring and annoying.
(Sorry!)
It's an interesting thing, actually. It's too strong to say I only tweet things where I don't expect disagreement. But I do take some trouble to only tweet things where I don't anticipate having trouble ignoring disagreement. Twitter is a low-value medium for disagreement, IMO
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