The archives are filled with opinions on line. The short answer is this: it's 100% personal preference.
If you do a search, you'll find dozens of threads like these:
https://www.crappie.com/crappie/main...s-mono-choose/
https://www.crappie.com/crappie/main...g-line-matter/
https://www.crappie.com/crappie/main...56-line-using/
https://www.crappie.com/crappie/main...-fishing-line/