I think that once you've done it (played music with others) you never really want to do it any other way.
I'm lucky. I get to play everything from a single to 12 pieces...everything from solo guitar (no vocals) to 5 keyboards and vibes.
There's nothing this professor of interpersonal communication knows of that beats the unspoken exchange between musicians of the same background and ability as they play in perfect time, without saying a word.
In my world, playing an arranger "ain't even close".
That being said, I don't tolerate the infighting, pettiness, drinking, etc. all of us have encountered.
One warning and the offender is "outta here". I make sure that, whatever the offender was doing, we can replace the effort with left handed bass, keys playing guitar parts, etc.
This is a business for me and I run it like one.
Russ