also try
Cortana what do you look like
Cortana do you have a boyfriend
very funny....
You cant record everything in the world with what she says. The more generic stuff uses her voice sound (which needs to be tweaked still to sound more like her) , but the actual questions you ask with actual answers, she needs to be able to record answers or enough answers to keep you entertained, or enough of the words in enough ways that they can be spliced together and wont sound like a robotAlthough, when doing actual phone tasks, e.g. reminding you, creating events, etc., she sounds the same why are there two different voices for her?
That said, I love the "answering questions" voice of Cortana. Sounds wonderful. Is it actually Jen Taylor?
As a side note, don't think she understands the complete question you are asking. What I mean it's that she actually gives you the same set of answers when you ask something like Are you ... ?
The same happens with Do you have... ? Do you like ... ? Unless you mention someone special such as Steve Ballmer or clippy after Do you like.
So basically there are no new questions you can ask her, most of the time she'll just answer something based on the first words you say.