I love teaching (but then, I learned from the best), and love my research - it's trying to do both all the time that I am finding taxing.

I use my physics knowledge to allow me to quickly grasp the underlying principles of whatever problem I am dealing with, allowing me to gain a working knowledge without getting bogged down in the details. It is this ability to be something of a jack-of-all trades (or a technical general practitioner as I prefer to think of it) that makes me valuable to the employer. Physics is the ideal background for this. In fact, as one goes up the management chain of this company, one finds that it is physics-heavy, as these are the people who have the ability to grasp the underlying concepts of a problem- which is what I think physics is all about. Hold the line when it comes to those things that traditionally make HMC great. That I was taught in small classes entirely by English-speaking PhD's who actually had office hours and didn't treat us an annoyance stands in stark contrast to the undergraduate experience of most of my peers.

I'm currently finishing my PhD in Biology here at UCSD. This was a big change from physics and I am not directly doing much physics related research. However, I think my physics training was very important. I learned how to be a clear, critical, scientific thinker which has served me well here. Having a physics background in no way hindered my applications to biology graduate schools. I think most schools considered it an advantage. The field of biology is becoming much more analytical and the perspective I have with a physics background is quite useful. Now that I am looking for a job, I think having a background in both physics and biology will help a lot.

My point is that the baseline skills for success in industry (I believe) are common sense, good communication skills, a reasonably broad background in science and decent computer skills. There will always be a market for bright people who satisfy these criteria, and a physics degree is a big plus for the applied science shops.