I had an early gmail account (so I got to pick a sensible username).
I've always been in the innovator or early majority, so why not Twitter?
I simply didn't get it... why do I care that you burnt your toast this morning? why do I care that the train was late etc.
I won't pretend I was the Champion Skeptic, but I simply didn't get it.
I finally figured it out... I don't have to care about if you burnt your toast this morning... if that's what you tell me I'll unfollow you, but if your interests overlap with mine then you're helping me to filter the signal from the noise on the Internet, and downstream I can repay the favour.
Oh and the 140 character limit stops you writing war and peace, it stops the information overload.
I'm converted... I love Twitter.