I think Twitter gets a bad rap from people who only know Twitter from the news. My wife has said about Twitter and Facebook "I don't want to know what someone ate for supper." Great, then don't follow those people. And at no time are you required to put that you cooked a delicious chicken and noodles dinner last night (3 hubby points for me). "Ability to" does not equal "obligation to."
I also don't believe it's a place to continue in-depth conversations. The #edchat is extremely popular, and I enjoy seeing the tweets come in. But wow, that's a lot of people and overlapping conversations that easily confuses simple people like myself. I think Twitter is a great place to meet new people and start conversations, but deep, thoughtful exchanges are difficult, in my opinion, 140 characters at a time.
Saying all that, I absolutely love Twitter. I've enjoyed developing friendships with people far away and in the area. It's been great to meet some people I follow in person and see the human behind the avatar. I learn more from the 500+ accounts I follow than I do at most conferences (not all). It is all about who you follow. I don't follow Hollywood celebrities. Why? What value are they giving me? I find my value in the educators and friends (many one in the same) who I get to interact with on a daily basis, 140 characters at a time. So, while John (as I call him) may spend his nights contemplating deleting his Twitter account, I plan on being here for a while. Feel free to hang out and learn with me. Long live the Tweet!