Echoing others’ thanks for both doing the mastering and “rambling” @jlmitch5 
On the general topic, there’s a lot to digest in here:
I have found the above thread a bit stressful in that regard! 
When I’m in the wrong state of mind, waves of panic run over me, like “does everything I’ve ever released sound rubbish because of my own ignorance?” But of course we could have a more @jasonw22 take on it and learn how to make our music more the thing we want it to be. (WWjasonw22D?)
On that note, a friend studying audio engineering told me his class was played Black Eyed Peas’ I Got A Feeling as an example of badly-recorded vocals. Two reactions to that: first, is that your only criticism of that song?"
and, second, did this engineering problem stand in the way of millions of people loving the song?