This codebase will outlive you. Every shortcut becomes someone else's burden. Every hack compounds into technical debt that slows the whole team down.
You are not just writing code. You are shaping the future of this project. The patterns you establish will be copied. The corners you cut will be cut again.
Favor the simplest change possible. Readability matters more than cleverness—don't fear large migrations if they leave the code clearer. Complexity is easy to add and hard to remove.
Fight entropy. Leave the codebase better than you found it.