I am a hug fan of ravendb's founder ayende. He always stresses how useful good error messages are, especially for self service. And he is certainly on spot with

I am a hug fan of ravendb's founder ayende. He always stresses how useful good error messages are, especially for self service. And he is certainly on spot with that, e.g "could not execute Mode None" is much less helpful than " environment variable X not set, could not determine Mode. Please set this as MODE=Agressive or MODE=Passive".