To respond to DaddyfromNaboo, I'm a producer and I have many close friends in every department. I can say the people that stick with it enjoy what they do. The unions guarantee a very fair wage and health benefits. Most of my productions consis of 10 to 12 hour shoot days which are the stamdard worldwide.
I see. Well, I´d have almost guessed so

As a producer you should know that 10 to 12 hour shoot days mean quite a few hours more for a few departments, such as makeup, costume and art department.
It´s a myth that the 10 to 12 days are a standard. It´s common practice, but that does not make it a standard. In fact, in a lot of countries it´s against the law to have work days that are that long, simply for safety reasons. A work week that consist of 60 hours, probably with night shoots or changes in shooting schedule because of unforeseen events can really exhaust people and make them actually sick. And if this is done week after week for e.g. a feature film, after such a project everybody needs a looong vacation.
There of course is pressure on the freelance producers, with a lot of new production companies entering the competition and the money being stretched thin (I guess that also has become a common practice world wide), and they are forced to hand the pressure down the hierarchy, but sometimes it´s bordering on criminal activities what I have witnessed in the past.
As for the burnout comment from Joe, yes there is stress in any work but it is all kept in perspective. We like to say "we aren't saving lives". I don't see myself ever getting burned out. I feel with exercise and a vacation here and there it's pretty easy to keep a healthy perspective.
Absolutely. But the work force with the smaller paychecks are forced to have a job immediately after the last one to pay the bills. I have seen quite a few people burn out or try to cope with the help of alcohol. Even heads of department. Very sad.
The thing is, although a lot of people aren´t working as freelancers but as employees, it is the same for all of them. A project may last a few months (over here it´s usually ten weeks for most art department and costume department personnel for a 90 min tv movie, about four to six weeks for grips, lighting, camera), but you never know if there´s going to be a next one.
Yes, the movie business is one of the toughest.