Professional

I am Telecommunications Engineer turned Project Manager. Seasoned Project Manager, with vast experience in both Agile and Waterfall environments. Indeed, delivered numerous international projects of projects all over the world. In general - Project Management is easy. Agile, Waterfall... Been there, done that.

I think that the most interesting (and, admittedly,  most difficult) part of PM'ing is stakeholder management. This is where fun is in this business. 

These days - sadly - most of the PMs I know work at various international corporations with areas of activities spanning across the globe with equally spread teams. In matrix organization structures you need to manage people over who you do not have any real power. This is why you need to manage these relations.  This is the challenge and fun in this domain. There are a few books on this, I recommend for example Influence without authority.

There's another issue which stems from the global presence of the corporations - fuzzy definition of responsibilities. I see that in many organizations - in modern world - it is so easy to play the blame game, that sometimes it's even part of the culture. Very unprofessional.  This is why I suggest following approach - if unsure - always assume it is your responsibility. I think Jocko Willink put this nicely in his Extreme Ownership. 

Last few years I entered into Risk Management responsibilities. This nicely compliments my PM experience giving very well-rounded view of how to best support modern company.