140 characters annoys me when I have something long to say, but overall it's something that I really like about it, and I know plenty of people who agree with me.
I don't know if they'd do better by dropping the limit, but saying it's a bad limit is definitely subjective not objective.
Email annoys me when I want to have a real-time conversation with my mother - which is why, when that happens, I use the medium that's intended for that sort of thing.
My point was that I would use a telephone or skype. Using twitter for the wrong purpose and complaining about it is like complaining that it's hard to hammer in a nail with a screwdriver.
I don't know if they'd do better by dropping the limit, but saying it's a bad limit is definitely subjective not objective.