I am software developer for Mac, PC and industry real-time OSes for 12 years, so I have a pretty good overview and close understanding of the underlying basics in microprocessor based technology.  
This helps imagining the reason for and hopefully the solution of problems.  
I love careful and inspired software work ("sustainable software development" - my company's slogan, see www.synthesis.ch), therefore I like products like MacOS(X!) more than Windows (in general - but which doesn't mean that there weren't things that are better in Win than Mac)
My current speciality is SyncML (data synchronisation)