Oh, I decided on something I care about since I posted here, oh so long ago (almost a month, iirc).
I really wish I was born like 500 years ago so I could be a polymath, but by this point there's just too much knowledge in the world. Also, there's essentially no such thing as scholars anymore, which would be my second choice. So, now my life's ambition is to be a polyconversationalist; that is, to be able to have intelligent conversation in every field of knowledge, so whenever I have a question about something, I'll know exactly how to ask it.
But yeah, knowing things is cool.