This might sound a little strange, but I would say programming. I have worked in the industry 25+ years now, and I've never had what I would call an interview. I've had informal lunches with the CIO, met the team at BBQ's, like that, but never anything more rigorous. On top of that, I'm fairly introverted, and don't have many friends, but I do have a large number of acquaintances, I'm known to be a good and loyal employee (I don't switch jobs near as often as the norm) and have kept up my skills (I hope) fairly well. I've gotten jobs because people knew about me, essentially, so it can be done.

I kind of fear when I actually have to do an interview. I'm hoping I make it to the end of my career before that happens.