Ask HN: What is the make up of a good software engineer/developer?

I would really like to know what your opinion is for what makes up a good software engineer/developer.

I'm not even sure if this can be an objective topic but I have been thinking about this for a while with out any concrete points beside that the engineer/developer should be analytical, have the ability to adjust to different environments (flexible), and be a fast learner (which partly ties into being flexible).