I always said if you have a passion for the job, the job is fun. In every way, I agreed with Juan, whether is managing people or working with people is the most challenging. Of course, there are ways or choices to handle each situation or each person. It is part of the journey of life, learning how to communicate and to be with other's who are not like you.
The other challenge of the job is long hours of work. 80 to 100 hours a week in the kitchen.
Of course, the hospitality is not the only field who have the same challenge.
I hope this will not discourage you to join the field. If you truly passionate about your work, you will make it work, it will not be a challenge.
Good Luck Ryan!