Stress
You're working on films, which sounds like it should be nothing but fun, but the truth is that just about every aspect of the movie business is more than a wee bit stressful. The hours can be incredibly long, the amount of work you are expected to produce in a short amount of time can be unrealistic, you have to deal with divas who don't care about your "art" as much as they just want you to make them look younger, and schedules and deadlines can change at a moment's notice.
There are certainly more stressful jobs out there, but just know that you may, at some point, be asked to sew like the wind.