why does parmesan cheese sometimes tastes good and other times like vomit?

hi I hope this is the right sub!

i discovered recently that I really like parmesan cheese. I grew up in a household with my parents where parmesan cheese tasted like vomit, therefore i always thought it was disgusting. but i tried some parmesan pasta on a christmas market last year and it was so good, then i remade it at home with simple parmesan cheese from my standard supermarket and it was so good aswell. now I thought like my taste changed because that happens when you get older but then I visited my parents and ate some Parmesan there and it was DISGUSTING. weird thing is, it was the same cheese I bought and made my pasta with!!!! but it tastes completely different. and then a few weeks later I had some leftover parmesan in my fridge and it tasted like vomit too. and in premade sauces parmesan tastes like that too. Is that like a freshness issue? Or is it like cilantro (disgusting)??? Someone help my parmesan issue please