Some of these really aren't bad habits.
There's nothing wrong with having one hand on the wheel or crossing arms or any of that crap.
Real men don't need airbags.
If I'm driving with any of my friends or my girlfriend they tend to ignore these, but if I drive my mum anywhere I get ear ache for driving with one hand, spitting chewing gum out of the window, if anyone cuts me up then I tend to give them a huge blast of the horn until they move out of the way, and flash them the middle finger as I go past. I also race people from traffic lights sometimes. However I can't drive at the moment. My cars being repaired after my neighbours stupid yuppie friend reversed her Range Rover into my car whilst it was parked on the drive.
-Not letting people out when I probably should.
-Putting the clutch down too early.
-Not putting handbrake on at traffic lights (I know, v.dangerous, I'm trying to remember!)
-Speeding on motorway (although who doesn't?)
-If I want to change lanes on a motorway and I see some moron speeding up so I can't I make extra effort to make sure I get out...and then drive slower than I would have done otherwise, just to wind them up.
-Generally trying to wind up people I deem to be morons.
-Doing hand signs at other drivers if they do something crappy.
Otherwise I am a good driver!
Palm steering, and driving fast when it's not needed (only in national speed limit areas). My personal habit is when there's a number on the sign, do that speed. When there's just a black line on a white background, they couldn't be arsed to tell me how fast to go so I go as fast as I like.
I personally don't think they are bad habits but the coppers have other ideas...
- no having two hands on the wheel when i should
- owning the roadwhen driving marked vehicles but not on the bell