Humans.
Humans, humans, humans, humans.
Much like in our real world, humans are spreading everywhere, they've driven away the wild orc tribes, they've made even dragons into rare creatures, and brought some previously unknown diseases to forest elves.
So far my adventurers have only visited human towns. They're comprised of 90% of humans.
- Dwarves, if found, are usually blacksmiths or guards, as a sort of racial stereotype. It's a bit like in my country Chinese people always open restaurants or clothes shop. Dwarves are the easiest race to find apart from humans, because they politically joined forces with them. Dwarves needed help fighting duergars and commercing food; humans want the dwarves precious mines and some of their technology. And duergars..... duergars are another chapter entirely. They hate humans, but they also hate dwarves. Gotta feel sorry for the poor duergars who seem to get along only with drow, and even then, the drow help them economically but refused to battle with them.
- Elves generally don't deal with humans, although my adventurers met a traveling sylvan elf merchant who married the human lady who was his bodyguard. Elves are a bit like the original natives who now are very short in numbers. Drows are NOT evil, they're just more xenophobic. Elven races have a very stoic view of life as "s**t happens because this is the nature", so they no longer are at war with humans. Except for drows who insist humans are worse than orcs. Only drows don't deal at all with humans, so humans paint them as evil and twisted and tell exaggerated tales of their evil society. Other elven races however have no problem with drows.
- Half-elves are the second most common race to find. Some of them live as humans, others live as elves. Of course it's much easier to find those who live as humans, but my adventurers will soon meet an half-elf druid who has the elves'attuning with nature and the humans'aggressive way of dealing with everything. She wants to lead a gnoll tribe to kill humans and drive them away from the forests. Very half-elf of her.
- Half-orcs are rare because most orc tribes have been killed off or driven far away. In the humans'defense, orcs ARE dangerous and violent, so it was a battle of two very invasive species which the humans won because they're way smarter, while orcs are almost beastlike. My adventurers met only one halforc so far, and yes, of course he was the result of orc rape. My orcs are classic orcs, beastly ugly smelly and aggressive creatures who act freely on their instinct.
- Gnomes and halflings are actually the same race. Leave it to humans to see that they look different and assume that they are two separate species. Imagine if an African and a Caucasian met gnomes and the gnomes assumed they're not the same human species. It's funny because one of my player characters is a gnome, so he's baffled by this and by the fact that hillfeys are called "halflings" which sounds like an offensive slur.
- Celestials and infernals are bodyless entities in my world, so a tiefling or an aasimar is either 1) a creature possessed by one of said entities; 2) the offspring that was had by any living being while that being was possessed by a celestial or an infernal. So anything can be a tiefling or an aasimar: almiraj are the aasimar result of the bunny offpsrings of a celestial that once possessed a bunny; humber hulks are the tiefling offsprings of an infernal creature that possessed a bug. A tiefling or an aasimar with humanlike shape is very very rare.