Writing exams is definitely not my favourite work, in particular coming up with clear, nice, sensible-looking, unambiguous - but still red herri^W^Wwrong answers for multiple choice questions.
At least I can give students a proper workout with my style of multiple choice questions, which - quel surprise! - usually have multiple correct answers. Every now and then it's also correct to tick none or all the boxes, just for variety's sake (and to discourage guessing).
Nasty, what, me? Now where do you get that impression from?