I would add, repeatable / reproducible results. Given the same input, you get the same output every time. If the input includes some sort of random seed for the

I would add, repeatable / reproducible results. Given the same input, you get the same output every time. If the input includes some sort of random seed for the express purpose of getting different output intentionally, then so be it, but I can't trust a program that I never know what it will do in response to what I tell it.