When you have other races, it seems obvious what their advantages are. Elves are smart and magical and agile. Krogans are super tough and battle ready and don't breed well. Etc. etc. But humans? What are they good at?
Because this post is perennial, I see the same stock responses over and over, and I always feel like they miss the point. So here's a braindump of all the things I think humans are good at.
Humans are tribal
And I mean this in the best way possible. They are community minded. They help each other. Bonds of shared blood, language, faith, and culture keep humans connected with their neighbors. In peace, they aspire to live up to their community's ideals. In war, they'll die to defend these ideals. Speaking of...
Humans are warlike
Because those savages over their with their primitive gods are no match for our enlightened culture and true faith, humans are always fighting. They train for war. They prepare for it. They horde arms and armor. They give social credit to the strong and brave and deny it to the weak and cowardly. They've trained horses and elephants to aid them in battle. They remember effective stratagems by making stories and songs about them.
Humans have mastered iron
Iron is the best metal. It's stronger than magic or song and can endure incredible hardship. And humans can fold it into any shape they want! Their tools are the best around.
Humans can lie
I mean, they can just say anything they want! If they swear an oath, they don't even have to uphold it! If they sign a contract, they can do whatever they want!
Humans can go into each other's houses
They don't even have to be invited in!
Humans are tough as shit
Humans can survive sunlight, moonlight, salt, flowing water, blood, alcohol, the touch of iron or silver. Their only true enemy is fire. But that's true of most everyone.
Humans have mastered nature
Humans can gather food, raise crops, and hunt game. They have broken and tamed horses, dogs, cattle, cheetahs, elephants, camels, chickens, ravens, goats, even the wily cat. They raise houses from the stone of the earth. All this without the aid of magic.
Humans are anti-magic
Unless a human makes the Witch's Pact, they are essentially immune to magic (both for good and for ill). In fact, their paladins and churches are anti-magical areas. The Others cannot cross into those places.