Greco Roman mythology isn't the only mythology Picture
As much as I love Greek and Roman mythology, there is far more other interesting myths and folktales from other countries as well. My person favorite myths and folklore are East Asian (Chinese, Japanese and Korean), Southeast Asian (especially Filipino, Thai and Indonesian), Slavic, Finnish, Near eastern (Armenia, Georgia...etc.) and Norse/Germanic mythology. Those get so little attention. There are many more interesting mythology outside the Greco Roman kind, just have to look hard for it.
BTW, my original science fantasy universe "Realms of Alerfa", focuses on all sorts of world mythology and folklore, even the more obscure kind. Just using an example.