Even after a few years with all this stuff, a number of sliders in the detail panel still remain a bit on the fuzzy side, for me. Although I'm not completely random with it anymore.. More like ordered randomness.
OTOH, I think this is one of the panels that will always remain extremely subjective.. And one where subjectiveness itself will always be heavily changing even in the same person, and even for the same image, over time (and also including whether or not one is wearing their computer glasses at the time, like they're supposed to
). I also don't think it helps that I've never come across any completely hard
detailed facts on what each slider does technically.. As in, from a Lightroom programmer's explanation. For all I know, those details may even be a trade secret protected by nda's..??
So I think refreshers are probably always in order from time to time, even if it's just to [re-]hear others' perspectives on what they like to do with them.
And for people that aren't able to view the previously mentioned video, like myself, here's a good explanatory on YouTube from Anthony Morganti:
https://youtu.be/KkrYXOszvfI