Attention Human Service Professionals. . .?

Hi guys. I'm working on an agency visit essay for my Human Service Cl. I did an interview at a local group home for the mentally ill. (It's not exactly a group home, but it's the closest thing to clify it as.) The clients are referred by the crisis prevention team. Most of them are on the brink of suicide and the agency offers counseling, medication services, etc for a maximum of 15 days. I did the interview with an administrative staff so she wasn't exactly able to answer some of my questions from experience. I want to know what makes one want to work in a place like this with the mentally ill? What drives them to do so? Is it enjoyable work? Or very frustrating? If possible, please add any other comments. They will all be appreciated.