I agree with so much of what you say, MattDillon, and evenas a habitual interrupter I am aware, to a degree, that this really does irritate and annoy.
I say "aware, to a degree ", because this thread has been quite an eyeopener! I am sitting here
, because the thread makes me think that I probably annoy people (alienate them, even) much more than I thought!
I do know why I have become a habitual interrupter. I'm deaf and group conversation is a bit of a minefield for me, anyway. I find it hard to follow conversation, the speed leaves me behind and if I want to have a say at all, I have to jump on in there. I miss social cues and, probably the bit that causes most irritation, if I'm looking the wrong way at the wrong moment, I often think that someone has stopped speaking (or don't realise they've started) and I will talk right over them, loudly, and keep talking right over them.
The thing is, I am (generally) aware that all this can happen, and although I will sometimes check myself, apologise and concentrate harder, a lot of the time I will simply plow on regardless, getting my bit in.
Partly, this is because it has become a habit and as I read this thread, I realise just what an unbearable habit it is for many, but also, experience has taught me that, no matter how many times I tell people I am deaf and how this might effect our communication, I know for sure that as the group conversation develops, the vast majority of people will forget to make any concessions to my participation. I am left with the choice of dropping out of most conversations or jumping right in there.
Hence my (I admit, bad) habit of interrupting. But (just sometimes) part of the cure might be to leave space for the interrupters.