Funny...my gran had a favorite embroidery needle that had a gentle curve to it from years of use. I don't know if it was her favorite because of that curve though, or despite it. It may have even been made that way although I've never seen one like it. Much more gentle curve than the upholstery needles she used to tie her quilts.
I just knew as a kid that was the needle that would get me a swatting with the flyswatter if I dared move it. LOL