Finding the right balance between well written, need-one-week, maintainable software, and fast-written, ready-in-2-hours-and-never-look-at-it-again software.

Last time it took me 20 minutes to integrate with a new API. I had a script that did everything you needed. I then spent 2 weeks on handling error responses, unexpected responses, exceptions, intelligent retries, logging, unit tests, integration tests, caching, documentation, etc.