Excellent list. The one thing I like about your post is that you used the word confidence. Confidence in abilities and concrete examples to back up your claim of expertise is key, as you point out. I've been on more than a few interviews and people respond to creative ways of thinking in the technical world. Every technical area (coding, engineering, etc.) has tried and true ways of going about solving issues. Every potential employer likes it when something is presented that shows a slightly different level of consciousness.