Which naming convention do you prefer for variants of the COVID-19 virus: Greek letters such as Delta or Omicron, or names of countries where first identified such as India or South Africa?

Which naming convention do you prefer for variants of the COVID‑19 virus: Greek letters such as Delta or Omicron, or names of countries where first identified such as India or South Africa? Published on November 30, 2021 → Survey conducted on November 30, 2021 on 2477 U.S. adults