Basically those things that you see in classic or popular fantasy settings. Elves, Dwarves, Goblins, Werewolves, Dryads, other humanoid races that can interbreed with humans, as well as Dragonfolk or Fishfolk or other similar races so long as they either tie in well with the setting, or are kept as a secondary race. Custom races are fine, but it's preferred that we try to keep them largely based off of the classic ones, or have a similar feel. I will be going over each of them on a case by case basis.