I agree that inconsistent is like jekyll and Hyde.I think context and meaning is relevant too. A person consistently trying is doing something positive, IMHO. Not perfection as @Weemie said. And a window; for example if a person is usually late, and now they're within 10 minutes, that's a good job. But that wouldn't work for an Employer .And to consider where we fall short, not other people. I'd rather have people be honest than consistent myself. Because to me that's the beginning of finding work arounds.
To me inconsistency is more like Jekyll and Hyde.