Black walnuts are absolutely worth the effort. Especially once you get the hand of cracking them open! Nothing else tastes like black walnuts. The English walnuts in the store aren't even close. Like @coffeetime said, driving over them is such a traditional, and fun, way to get those hulls off. I've also played a lot of "scuff a nut" with heavy workboots! Enjoy all your tasty treasure! :D