Well everything really, it's a very stressfull position, lots of responsiblities, lot of things that I'm in charge of.

As strange as this sounds I often have to be the "voice of reality" people at work come up with some rather creative but strange things they want to try to do. And often they don't take it well when I have to tell them, it won't work, the clasic reponse I get is "why not?" Trying to explain the laws of physics to someone who is working very hard at not understanding them is nothing but stressfull.