I find my (old) knitpicks nickel DpNs too slick and a smidge too sharp. I have bamboo as well which I love but...some yarn is too grippy for bamboo.
I prefer bamboo for dpns, as well, but I've found that the Knitpicks Harmony needles are a good choice when bamboo is too sticky and metal is too slick.
With my dpns I'm not as picky as with my circulars. I love the cheap boye or yarnology dpns that they sell at hobby lobby.
I found a set of those on eBay $32ish, free shipping.