Why Rapaire!
I am surprised that you feel that what kind of nut one is shouldn't matter. After all, an Almond is nothing but a peach pit with delusions of grandeur.

Hazelnuts/filberts are difficult to crack - but survive the shattering of their shell quite well - and are subtle.

walnuts are very difficult to get to come forth from their shells - and rarely survive the experience intact. (the trauma!)

and the peanut is nothing but an imposter! A legume masquerade!