Isn't that the truth! It has happened to me a few times. I actually wanted to serve too. Nope. The minute I revealed what I did: business owner, engineer, software, etc. Done. Excused.
If we're going to report anecdotes, two (aerospace) engineer friends of mine (one of whom professed this purported fact) at the same company got picked for a jury on the same drunk-driving case.
I think it depends on which attorney gets a turn when they question you. I don't remember exactly, but don't they take turns? I would think that, depending on the nature of the case and the evidence, one or the other attorney might prefer to inject jurors into the jury who might tend to take a more analytical approach to things.