I got 3 core things:
1) Telling an entertaining story, or at least the way I want to tell it.
2) Keeping it going despite flaws, rough patches, self-loathing and burnouts.
3) Learning to love the process over the product.
As far as achievements go, I just want to finish this story to the end and learn as much as I can for my next big project. It'll be a few years, but I know it's worth it.