I'd define decent as the minimum expectation I have for having someone in my life. I use the term a lot, but I had never been clear on what I mean by it. I think for me its that the person broadly reciprocates the work I put into the relationship, both in kind and degree, unless I explicitly say otherwise. I'd say most of my interpersonal problems would fit under this; mainly being expected to put in a lot of emotional effort, and either they don't reciprocate it at all, they unambiguously do not match it or they ignore me when I tell them I don't care about gifts and act like the infrequent gift makes us equal.

But that's me, and I expect there are many more varied expectations from y'all. So, what make some a decent person to you?

One of my favorite topics in Psychology is personality and there happens to be a very good Five Factor test that is free to the public domain with all 3,000+ items available for download. Some notes about the IPIP NEO-PI:

Purpose of this On-Line Inventory

• The primary purpose of this on line inventory is to educate the public about the five factor model of personality.
• More specifically, the report explains the likely consequences of one's standing on five broad personality domains.
• These broad domains cover normal differences in personality that should be obvious to people who know you well.
• Secondarily, this inventory estimates your standing on the 5 broad domains and 30 subdomains of personality.
• The inventory does not reveal hidden, secret information about you nor does it assess serious psychological disorders.
• The report is designed to be objective, not pleasing or flattering.
• Measurement error, misunderstandings, carelessness, and mischievous responding can invalidate the report.
• If knowledgeable acquaintances disagree with the test results, then the results are wrong.

Link to the questionnaire:
https://www.personal.psu.edu/~j5j/IPIP/

More about the International Personality Item Pool:

https://ipip.ori.org/

Under the right inputs opinions and worldviews can be changed relatively easily, but what about the more subtle stuff underneath? Can a workaholic with a strong drive later in life become lethargic? Can an innately introverted person later in life become innately extroverted?

Those aren't the best examples, but that said my intuition would be that these tendencies are too deep rooted to be significantly altered and can only be superficially mitigated against one way or another.

If this is to a degree incorrect I'd love to hear some anecdotes.