Definitions of "amazing" vary, but I guess if we go by adrenaline, maybe a 10-15 meter dive in the sea counts, right? If we judge by results, I would consider changing a whole university's campus attitude to something constructive and positive could qualify as pretty amazing (though I did it with friends, not alone).

Teach, Share: science (I can talk all day about nature sciences and social sciences alike), stories about people, economics, politics, history, technology (no, talking about iPhones doesn't qualify), traveling, countries and world cultures, cultural characteristics of countries, video games, strategy, cool ways to solve all sorts of problems. Learn: anything interesting, but nothing shallow and pointless like celebrity gossip

I'm highly adaptable, it depends on what expectations are - either we can hang out, have fun, tell stories, play games, I can also contribute something, or we can keep it simple, if the host doesn't have time/energy for a lot of interaction. So it depends on the hosts, I'm open to discussing these issues without embarrassment.