A really simple Mr Grumpy I made up for a bit of a laugh and to practice using Fusion 360.
I have now updated this a little to improve printablity and I think the hand looks a little better now as well (at least from the front). I have increased the tolerances a little and changed how things fit together (increased fit depth and removed the taper from the part and instead increased the hole diameter).
I have some other expressions and arms/hands partially designed and was thinking about doing a sort of Mr Potatohead type arrangement.
The legs, eyes and arms were all mirrored so would only need to be duplicated when printing.