The last several months have been challenging for me as a project manager. In fact, if I think about it my entire career in project management has been a challenge. Some days are better than others, but as I look back over the last eighteen years I'm glad I chose the profession of project management.
Over the course of my career I have met many people that call themselves project managers, but when questioned about their processes, they don't have much to say. Without a repeatable project management process in place, I'm not sure what you are doing, but it isn't project management.
You will find as I have that many people are promoted to have the title of project manager because of their organizational, business, or communication skills. Others are promoted because they are a highly valued employee and with good technical skills, but their personality isn't geared towards managing people. For project managers to be successful, keep in mind what I have repeated in the past - focus on process, communications and results in everything you do. Any person that is well skilled in these three areas will be successful in what ever endeavor they seek.
As PMI says, project management is both a science and an art. We must continually improve our skills (Sharpen the Saw) and always be aware of our communications. Dealing effectively with challenges and adversity will ultimately define who we are as project managers (god or bad). More times that not you will be judged and assessed on your personality, not your performance. Keep that thought in mind when dealing with your peers, your manager, and your customers.