Have you played any roguelikes? My favourites are
https://sites.google.com/site/broguegame/ and
http://www.amirrorclear.net/flowers/game/sil/index.html since they're non-grindy, brisk and transparent
What do you think about thorium nuclear power?
What's the most complicated thing you've programmed?
What's a mathematical/scientific/logical concept you tried to wrap your mind around once but couldn't?
Ever make any music? You should learn Famitracker with me~~
What do you think about osu! ?
Favourite cryptographic concept/algorithm?
If you woke up one day and were suddenly 100% determined to get Stepmania out to the masses, newbie friendly, easy to find simfiles and packs for no matter what level and style you are and what genre you're interested in, easy to play multiplayer and gather statistics on, etc. but were otherwise the same person, what would your plan be? And no giving up in this hypothetical
Favourite fruit? Favourite vegetable?
How many people can you recognize by face? By name?
If you had a magic wand that, when waved, would change one thing about the US educational system, what would it be? How about the US legal system? Economics?
If you ran for President (let's assume you had the funds and connections to do it), what would your campaign be about? What if you wanted to win above all else, would it still be the same platform?