You learn how rude people can be (especially the complementary parkers)
People can't read a sign that says "Do not enter, Valet only" and they always want to argue or negotiate with you. It's pathetic.
Even though you may have worked at your location for a long time, the possibility of getting a new manager that treats you like they just pulled you out from under a rock is likely,
You can get stuck with a crappy manager (but eventually they do something stupid and disappear)
People who have worked there longer than you (even a one month difference) will act like they are your God or Goddess
If you are a bad worker with an attitude problem, don't appreciate your great job, and have bad hygiene, you won't last long,
Sometimes people will leave diapers full of crap in their vehicle, and it will smell worse after fermentation in the summer sun.
Sometimes you'll get cars that you want to park in Lake Woodlands, but can't.
Sometimes you'll be asked to stay later than what your shift calls for, but the tips you make are amazing so don't decline. If you do complain about this job then you should probably go work in fast-food.