I've also found myself quitting a lot more things as time goes on. I agree with you that it's often the right thing, like when you are being treated badly and are unhappy every day, when you feel like staying is changing you for the worse. We do live in a different world than our parents did. It made sense in their day to stay at one job and work there until you retired. It doesn't for us, usually. If we are even lucky enough to find a job in our field, the pay is not enough for us to survive on independently, much less to have a family and buy a house. I think this is one reason why there is such a rift between generations. The older people can't understand why we won't settle down and get on with our lives, but the economic reality is that we can't. It's hard to know what to do and how to beat the system.

I think it's important to stick with a project if you really believe in it and are passionate about it, but even then, in something like film, you are depending on so many other people, and if they aren't coming through for you, it can feel almost impossible to succeed. I had so much frustration my first few years making films as a student and amateur (I am still an amateur--hopefully that will change to professional someday) because I worked on many projects that never got finished, so I had put in a lot of work and effort and had nothing to show for it. I think that was why I stuck so tenaciously to my student film and finished it three years after starting even though I knew it wasn't a masterpiece or anything. Thankfully things got better and now I have a few finished short films under my belt, but getting to that stage has been incredibly painful.