I use roaches and find they are more nutritious and do not require gut loading. However I still find a use for crickets periodically, so it really depends on what you keep/ are feeding them to. My collection is pretty much aboreal insectivorous reptiles and invertebrates, with a few exceptions (P. pictus and some leopard geckos) though I may start collecting some Pachydactylus too, so roaches would work for them.