Kobold Avenger
Legend
I certainly don't like mono-cultures for any humanoid, but the trend seems we're going from a single monolithic culture to 3 different cultures in many cases. It's like the Rule of Three moved from beyond Planescape. I guess it's the easiest number to have as it's, "here's the one you know, here's it's opposite, and here's something else". Having 4 or more might seem too much for some.
It's certainly something I thought about with the thread on FR Drow with Udadrow, Aevendrow and Lorendrow, but it's already in place in Eberron with Vulkoori, Sulatar and Umbragen (Drow), Aereni, Tairnadal and Khovaire (Elves) or Ghaal'dar, Heirs of Dhakaan, City Goblins (across all Goblin races, Marguul Bugbears might break that). It seems to be a coincidence that it's often 3.
It's certainly something I thought about with the thread on FR Drow with Udadrow, Aevendrow and Lorendrow, but it's already in place in Eberron with Vulkoori, Sulatar and Umbragen (Drow), Aereni, Tairnadal and Khovaire (Elves) or Ghaal'dar, Heirs of Dhakaan, City Goblins (across all Goblin races, Marguul Bugbears might break that). It seems to be a coincidence that it's often 3.