realized how rare the other races are
I assume you're referring to D&D 5e.
Elves, Dwarves, and Humans are always the most common. The more monstrous races typically follow after that. I've run into plenty of Tieflings, Kobolds, Dragonborn, Aasimar, Genasi, and Goblins. Way too many Tabaxi for my tastes. Encountered a few Leonin, Kenku, Tortles, and Verdan, too.
Really it all depends on what the player is looking for in regards to both mechanically and role-playing. Whether or not you have the necessary books matters a whole lot, too. The vast majority of the monstrous races are only in later books, with the PHB only having Tieflings and Dragonborn.