Christmas cracker toys? Post sorting machines? Agricultural equipment? Carburettors? Manufacturing test jigs? Nuclear weapons? What wouldn't get you out of bed in the morning? This thread's the opposite of our old "The top 5 things I would like to design are..." thread. What would you least like to design and why? This is a difficult question. Personally I'd be interested in having a go at most things. Even projects that appear "boring" at first glance may actually involve engineering challenges, production processes and technology that would make it totally worthwhile. I'll say "weapons" myself. I wouldn't want to work on a project that would ultimately result in harm to others.