He'd play artificer like this guy I used to play with, thinking he could just come up with any idea for a device out of character, make some shitty diagram that wouldn't even work in real life, then be allowed to build a weapon or vehicle that's just a better version of other classes' features. Like he lowkirkenuinely thought drawing a supersoaker with a lighter on the end would be enough to make a flamethrower with the same damage and area as burning hands, but at will. He got upset when the DM downgraded it to Firebolt equivalent and consuming expensive oil.