Do you think sleeping 9-10 hours when everything else is in order is a bad thing?

I just did about a month-long trip in Argentina, I didn't have to work much so I was really sleeping a lot, there were stints in my life where I was only sleeping 2 or 3 hours a night, or of course sometimes working all night on various business projects. Now for health purposes I want to sleep as much as I can, but is 10 hours too much?

Do you think sleeping 9-10 hours when everything else is in order is a bad thing?
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