The more CPAN authors you hang out with, the more you know. Most of my PM answers have started to follow the form "See module XYZ::ABCD for a proper implementation of what you're trying to do." where XYZ::ABCD seems to be List::MoreUtils more often than not.
My criteria for good software:
Does it work?
Can someone else come in, make a change, and be reasonably certain no bugs were introduced?