All kind of customer contact work, is horrible..
Worked with drawing water and ventilation in one of the mines around my town. Fairly quiet and nice job in many ways, as long as you don't mind constant 4+ degrees at floor level and +35 degrees in the roof (where we usually worked using scissor lifts). Getting wet, sweaty and muddy, change your skin colour during work hours (or at the very least, you'd get a nice square mustache resembling that of a famous dictator), and sneeze black gravel...
Oh and work started at 5AM, so I had to leave home at 4:30 at latest... Nothing I was ever bothered about. It was fairly nice getting of the job at 1PM cause working underground means that you get cut a hour of worktime. Otherwise 2PM.. Sadly though it was a time limited employment..
Today, I work as distribution driver for a small-medium company who in turn are contracted by a global post service company (which seems to have a policy of disregarding anything the people that are actually performing the work says, I doubt this is uncommon though).
Most days it's not that bad, if it weren't for the container loads of goods we've (a crew of 4 people) have to distribute in a town of 16000 people with 2 mines (as you can imagine, they require a hefty portion of the goods). And some 16 818,22 km² area to distribute the rest of the goods in... Now mostly goods are distributed whitin the town.
But there's always that 1 package weighing in at 1 kilo, that the costumer demands we deliver to him 60km away when you got a full day of goods to deliver in town..
Worst part is that in some cases you can't really tell the to dig a pit and put a lid over or wait until there's enough goods so that it's at least profitable half the way there.. The medicine deliveries, as you cannot, obviously, deny people that.
Oh and there's that instance when you have to deliver damaged stuff (happens all the time). Most are capable of processing the fact in 99% of the time I didn't have anything to do with it to begin with. And even if it was my fault (and I don't destroy stuff on purpose while I'm on the job) there's still nothing I can do about it.
And the flame for delivering the wrong goods, again happens all the time, and while the costumers are 99% of the time understanding. The company who we (we as in the company I workd for) distribute goods for goes bananas, which they actually do for everything that happens to go wrong, sometimes even though it went right.
Hell you know that they are simply flaming you for flamings sake when they proclaim us idiots, morons and doing it wrong when we send them a whole truck load of goods we picked up from a mine to deliver southwards... Aparently they didn't have any trucks to spare that day. And obviously we are to be blaimed
Oh and some practical problems. I drive one of these http://en.wikipedia.org/wiki/Mercedes-Benz_Sprinter
but with a proper goods space behind it, complete with a lift and such so I can easily deliver lighter pallets and such.
However, I wonder who thought it was a bright idea to make a car with so much weight on the front, backwheel drive? Can't even start to count how many times I've got stuck in places you shouldn't even get stuck at! (this is in the winter obviously whenever there've been much snow or when there's very slippery). Thank god gravel exist.. oh an shovels.. Have taken the practice of always having them close at hand. Still, if it only had 4 wheel drive or even front wheel drive...