funky station

I was curious if it was a normal thing for someone to want to take on wildly different jobs. I've seen almost every corner of the station, aside from Security work, and was curious if anyone else has tried the absolutely daunting challenge of trying to learn Atmospherics after just finally grasping how to properly do Chemistry work, or tried to learn how to perform basic surgery after spending a week cooking microwaved pizzas.

So, the question stands: Have you worked more jobs than one? If so, what jobs would those be? Do you switch jobs often, or is it a once in a while thing?