Actually, my Dad used to talk to himself and I find myself turning into him ! For example, I'm walking along the road, passing some young lads wearing hoodies and looking a bit dodgy, under my breath I say
"Bet they're up to no good"
I see a lady on a bike with quite a large backside - I say
"Look at that - like a bag of nutty slack"
I doubt anyone knows what a bag of nutty slack looks like, including me but my Dad's voice comes out of my mouth before I can shut up.
It will get me into trouble one day.