Michelle and Boomer,
As one who is married to a fellow rocket scientist, I have to agree with alot of the insecurity. You are one of the minority of outgoing engineers. Most have a hard time with anything that does not involve technical terms. I believe that it is a throw back to their days when they had their heads in Math books (D.H.) while there were others that were very busy sharpening their social skills(myself).D.H. just takes longer to get to know people. Keep up the hello's, your smile will eventually thaw them out.