not sure there are any other lines of work where one is
so regularly subjected to rather unpleasant people, yet must
keep serving and smiling--whether at the dining table or
the front desk. Oh, I know ... there are also
a lot of very nice people who appreciate your skill and
hard work; but more often than not, you find you are satisfied
with a pleasant "thank you." and perhaps a decent tip.
In short, these are "people"
professions, and the better you understand people (and
more rewarding your life and work will be.