Aside from actually knowing a lot about weird telecommunications technology, one major lasting benefit I got from spending a lot of time on the road in big, branded trucks (often full of heavy stuff like the old fibreoptic welding gear, or banks of batteries and RF analyzers and so on making them really unwieldy) is that you just couldn't drive like an asshole. You couldn't honk, you couldn't speed, you couldn't cut anyone off, you couldn't yell, you couldn't gesture. If you did, someone would be phoning your company and either you worked directly for a company and you'd be in trouble or you were contracting something to someone and you'd lose a contract.
Actually, just yesterday I had someone really bizarrely freak out at me for parking "too close" to him in a parking lot (next space over in a moderately full lot but by sheer accident I left him nearly three feet on the side). He called me "motherfucker" about twenty times and just stood there ranting about the ridiculous stupid bullshit I'd pulled by parking next to him, instead of next to the guy on the other side. He actually had so much room he could roll the shopping cart between our two vehicles and load stuff in the side door of his minivan with no problems so honestly I'm not sure where the outrage was coming from.
Anyway, once I realized I hadn't somehow unknowingly backed into his truck or something, I just sat there and watched him for a minute to make sure he wouldn't get squashed when I pulled out, and then drove off. I don't think my pulse got over 70 the whole time because I'm not invested in him thinking I'm cool; I don't care at all if he thinks I'm an asshole. Particularly not for parking in a parking spot.
As I later explained to someone else, who knows me a little bit and was all "whoa did you get out and totally fuck him up" because he can't really distinguish between being martially inclined and being an aggro douchebag, when people have handbag dogs that sit there and yap at me I'm not like "oh yeah? let's fight bro!" I'm just going to shrug and walk way and probable never think about it again. And if it's a rottweiler, I'm not like "yes this is awesome" I'm like "hmm...better think this through because both of us are going to get hurt if this goes down, no matter what."
I don't really mind getting dinged up a bit but it better be over something worthwhile.