"Tell us about yourself."
Well, "yourself" is a very common word of the English language. It is used primarily when identifying one person with something they need to do. IE: "You need to stop reading this and do something with yourself".
"The things you do in your spare time, your interests, hobbies, etc."
Well im registering on a f*cken pokemon website. What more do you need to know?
"I came here to chew bubblegum and kick ass. And I'm all out of bubblegum."