I once wrote a packaging script that saved 2 man weeks of recurring work. Not the swankiest or the most challenging job I did, but it was immensely gratifying,

I once wrote a packaging script that saved 2 man weeks of recurring work. Not the swankiest or the most challenging job I did, but it was immensely gratifying, since this time was directly billed to customers. So yes, fixing small non-critical issues can be very rewarding.