Fueled mostly by coffee and a little bit of booze, I have a real hankering to write that doesn't go away. Even when I would prefer not to be writng, it just slides out of me in an uncontrollable fashion, and I just have to sit and deal with it until it stops. So, it seems like it's just a thing I want to do for the rest of my life, whether I like it or not. I'll be writing movies until I die, because that's just how I am.
The way I look at it: you can save the cat and complete the hero's journey and do all that good stuff the books tell you to; nobody gives a fuck about your script if the characters interact like the stock characters you read about in those books. I will give you unique characters with memorable and enjoyable interactions with a higher priority than a textbook act structure. Audiences forget plots but they remember characters; and if I ever write a forgettable character, then I'll stop writing. But don't count on that happening.