>>I must confess to getting much more satisfaction/enjoyment when working on software where the outcome has concrete physical manifestation (other than something moving around on a monitor or a gradually emerging piece of paper) - preferably with real-time processing requirements.
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>I did gantry robot positioning with a 1kw UV source on photopolymers. Any mistake immediately turned into a concrete physical representation of itself. And it was "much more satisfaction/enjoyment"

The guy who invented tattooing by PC will carry one for his own bugs on his hand for life...