Boring AND conceited. I always roll my eyes at this trope of “unlike all these different fantasy beings that are good are specific things, we can be good at everything”. Seems like imagination falling short, that other beings would not have their own breadth of possibilities, and humans wouldn’t have their own unique advantages that are particular just to them.
If I had to pick one thing, it would probably be something teamwork related. Humans are very social beings compared to other animals.
Not so sure. When it comes to human hatred, big differences, petty differences and made-up differences work just as well as one another to motivate atrocities. Elves and aliens would end up on the list, but I don’t think they’d hold us back from being awful to ourselves. Ultimately there’s no real logic, so in what order that would happen is anyone’s guess.