Question for people who don't want a "cantina effect": do you also limit the number of intelligent monster species?
I have a world that has a PHB-only races (plus orcs, minus dragonborn) limitation, because when I made the world, we were teaching a newbie how to play and I didn't want to overwhelm him with choices. But I also made the choice of saying that there were only two other intelligent humanoids in the area (kobolds and bullywugs), and except for dragons, other intelligent beings are very much supernatural in origin (fey, elementals, undead, etc.). When we move into a different area of the world, the players will learn that there are different races there.
So I was just wondering what other DMs are doing. Do you have tons of intelligent beings but only a few are playable?