So, I am in the market for a new job. Today I did something I haven't really done before, I brought my Arduino and a couple of shields I've made with me to the interview. It was great when I was asked, "what do you like to do for fun?" I pulled them out, and explained about Arduino.
The shields aren't terribly complex. One is a RTC clock while the other is a LED matrix (8x6) I made just because I had a bunch of blue LEDs sitting around.
Even better, I was interviewing for a component company. The hiring manager noticed their parts on my board. That hadn't even occurred to me. I've been using a reel of their components for my personal projects for a very long time.
Moral of the story, show and tell always goes over well. Now, we will see if the technique worked.