Poll: AI PhD thesis topics

OK - the other day I said my next AI experiment would be to see whether AI could write me a proper defensible PhD thesis on a topic of my choice.
But I'm after opinions - so I'm running a poll below. Select up to 5 or add your own suggestion in the bottom 'Other' box! š - you have the opportunity to shape groundbreaking research here...
(if the poll below isn't showing correctly in your email, just click through to my site...)