Defining one thing based mostly on what it is not is a horrible concept.
Eh, it is a good start line. Clear off numerous the conceptual house after which you possibly can fill it in with one thing completely different.
The barony the place my marketing campaign setting began has simply people, dwarves and gnomes, and everybody’s participant characters had been required to be a type of. Whereas it was in any other case a really basic D&D setting (purposefully so, since I had newbies taking part in), not having the ability to herald yet_another_elf or my_standard_halfling_rogue meant it had a definite taste from different areas we encountered afterward. (And no, no orcs, both.)