I find it much more believable and I can play characters I am familiar with.
In mythology we see cities in the clouds, cities under the seas, cities carved through rock, giant sea monsters, dragons, women with snakes growing out their head, Harpies, elves, dwarves, pixies, ogres, titans, armies of stone etc etc so this isn't about not having imagination but rather a fantasy that draws inspiration from real world such as our own ancient history / mythology v's a fantasy that tries to create a world all on its own.
Example of fantasy that sets it's foundations on our own mysterious lore / mythology are:
1. Warhammer = Empire & Tilea = central Europe (Holy Roman Empire) & Italy, Bretonnia, Albion & Estalia = Arthurian myth, France British Isles & Spain, Araby = Arabia, Norsca & Kislev = Scandinavia & Russia etc, Nippon & Cathay = Japan & China, Lizardmen = Americas, Dwarves = Mesopotamia (like Skyrim also has mammoths, Sabre-tooth tigers etc)
2, Lord of the Rings = based itself on races and warrior styles from Germanic lore (The only thing that Tolkien truly invented himself was the Orc).
3, Fable = pirates, gypsies, bandits, Albion = Europe, Samarkand = Japan / China etc
4. Witcher = witcher is a witch-like character from Slavic mythology (Witcher is a Polish made game)
5. Risen = pirates, west Indies themed areas
6. Gothic = Germanic / Slavic mythology (Goth was a Germanic tribe from Scandinavia / Northern Poland)


