I just had (at Tel Aviv airport) one of the most thorough security checks I've ever had. Actually I would say it was 3rd most thorough.  In all 3 cases I have felt like at some point the person questioning me switched their focus from assessing me as a risk to just trying to figure out exactly what I do. That seems to mystify some people for some reason. Also not everything I do makes sense so that doesn't help. In general security checks don't bother me--mostly I figure what they do may actually keep me and others safe.