I’m leaning toward the rather open-ended, ambiguous, “Dude, WTF?” (bonus points if He actually says ‘W’ ‘T’ ‘F’)
or…
“Of course I’m black. I’m also white. Or Asian. Or East Indian. Hell, I can be Charlize Theron if you want me too. I was doing damn good the day I made her, I tell you what.”
or…
“Hello Neo. I am the Architect…”
or…
“Did they ever find out that other word that ends in ‘gry’? That’s been pissing me off for about eighty years now.”
Even if I am older than you (which I’m not entirely sure is accurate), you can bet you’ll beat me to the gates - I plan on finding a cabal of vampires to turn me before I get too old.
And I wouldn’t go so far as to say I’m an atheist - I think agnostic will do for now.