Not as cool as any of the above (Jeez Square! You're a tough act to follow.
). But, two of my favorite jobs were the last two I had before deciding to stay home when Thing 1 was born. The first was assisting a construction manager. It was just the two of us, in a satellite office, completely removed from office politics. Very laid back! I knew what needed to be done, he didn't care when I did it, so I could have flexible hours, go to appointments, etc. He made the final decision on contractors so we were always getting sent all kinds of goodies, food baskets, etc. He would hardly keep anything and insist I take the rest home. I was soooo disappointed when he got transferred to another state.
When the company down the hall found out he was being transferred they asked if I wanted to be the office manager for them. Again, laid back environment, fun people to work with. It was a Belgian company so someone was always coming or going from there and I always got a box of chocolates from Belgium.
They developed rapid prototyping software for both medical and technical applications. The medical was the coolest! And one of the best parts of the job was hearing from a surgeon about how the software helped a patient, or how a University in Scotland was using it to find out more about a mummy. Fun stuff!
Almost makes me want to get a job again. Almost.