It's odd because I'm a grumpy old fucker at the best of times but I've become more chilled driving as I've got older.
I think it's a bad experience I once had in Chester when I was younger where I pulled out in front of a white van who came right up behind me blowing its horn and flashing its lights so I, of course, slowed right down and then accellerated as he tried to pass and generally took the piss. Then we came round a bend into standing traffic.
Turns out there were 4 navvies in the van who disembarked and "made their displeasure felt". Fortunately, I was able to lock my doors and the lights changed so I could drive off quickly with an airy wave. Otherwise I might not have been here to tell the tale.