Two definite challenges in being a police officer will be dangerous nature of the work and the long hours along with shift work. In addition each day you got to work, risking your life to protect the community, so you often put your own safety at the back of your mind. Racing through traffic to crime scenes, risking being shot and approaching unsuspecting criminals are just some of the daily activities that make the job dangerous and unpredictable.
While there are bound to be lots of challenges, the rewards should outweigh them. First of all you can meet a variety of people, it can be a grate alternative to a boring desk job. It is immensely satisfying to save lives every day and also to help people make better choices. Most often you will encounter people at their worst (drug addicts, gang members, thieves). The most satisfying aspect of working as a police officer is the unique opportunity you have to show these people a better way.
Working as a police officer would not always be easy. Every day would be sure to bring its challenges. Whatever the challenges, the ultimate reward would be following my dream and helping keep my community peaceful and safe.