Discussion on: What are your guiding principles in software development?

In addition to what others have mentioned, I value the following:

1. My product is ethical, my design is ethical, my code is ethical and my team never builds anything in violation to this.
2. Whatever is built has good UX.
3. Code and design are extendible and maintenable.
4. We don’t rediscover and reinvent the wheel twice in the same project.