I saw this on another Disney forum that I stalk & I thought it was an interesting question. Some people fantasize about working at WDW..regardless of if you actually have interest in working there or not what job would you NOT want to have at Disney World?
Other than anything dealing with people's bodily extremities..I believe it would be Guest Services..because I know when I go in there with a question, comment or concern I am all sunshine and popsicles but I know (and I have seen) some NASTY people walk in there demanding things.