Split personalities?

Is it possible to have split personalities on a small, useful level? I think so. I mean, a couple of months into working at the place I am now, I got so used to the problems people spoke about on the phones and which responses to give, they all came automatically. I went in for one four hour shift and when it was over it felt like I'd only just sat down. Maybe it's just the subconcious taking over when the frontal lobe doesn't need to function. And in that case, how worried should I be that my job has become such a big part of me that my subconcious can do it?

It still happens occassionally. If I've got a really long and boring complaint to apologise for, it'll just happen. Why is that significant? I'll tell you.

I've always found apologising hard. The main reason seems to be that it is a way of admitting defeat, and that's not something I like to do. You're a pretty privileged person if I apologise to your face, and even more so if it isn't forced. This is why the phone version of me is a bit worrying. Why the hell is he so apologetic? What's his problem?