Post-Theist "Atheology"

[Gemini]

Instead of thinking about meaning as something imposed on us by the structure of reality (theistic or otherwise), think of meaning as something like a creative project. We create meaning, but creating anything is like searching through a infinite library of all possible meaningful stories/endeavors. Every possible story is already out there, in that library of all possible combinations of thoughts, and it's our job to find the good ones. The really good thoughts, durable enough to last through a phase of your life, or longer. 

For me, a joyful, pleasurable life is a quest. A search for meaningful experiences, and the most important part is the people you experience life with.

I compare music with meaning, morality, and well being. We might all agree upon a spectrum of sounds that contain what we would call music but our individual tastes might range from opera to dissonant jazz.

I think that's a good analogy. There is definitely a subjective aspect to it; tastes in music and existential philosophy can differ. But music isn't completely subjective. There are (according to a friend of mine who's studied music theory) objective criteria by which we can evaluate the quality of music. Listen to David Hasselhoff for an example of objectively crappy music. 

Likewise, there are objectively crappy existential philosophies. Like a sense of purpose in life that comes at the expense of other people's well being. This invariably entails denying the humanity of human beings, which is ignorant or delusional.

Or finding meaning from obeying the commands of a supernatural person. If a course of action is worthwhile, it's meaningful to carry it out whether someone commanded you to do it or not. But if it isn't worthwhile, attaching a fiat to it does nothing to justify it.