That would make sense. Some skills are better suited to certain careers. That simple.

And, well - no, I don't think so, but it's like you said with quirks. Some people are just better suited to doing certain things. And maybe some animal personalities may suit better, too. Some may have too much energy for a slower work environment or a more detailed task, while others are stronger and more suited for heavy lifting.

Some of that depends on you. I've been in the company of both, though, and in some places you need every type of personality to be successful.