I suppose legitimately the most interesting person on this planet would be one whose lives has gone through the most extreme experiences imaginable. I'm talking drug addiction, extreme poverty, incredible wealth, getting cancer, surviving cancer, travelling the world, learning a ton of languages and achieving great things through those experiences. Making a real impact in the world.
Obviously this sort of a person would be extremely difficult to find, and anyway, their life might seem like an exaggerated Oscar-bait Hollywood film - so interesting it's uninteresting because we'd find it all so hard to believe. There also needs to be an edge to an interesting person. Maybe they're not such a fun person to hang out with, maybe they did something wrong in the course of their life, maybe they're reclusive or very quirky or mildly psychopathic.
So an interesting person has shades, has definite character to them. We do not like everything they did, but we are fascinated by what they did, how they did it, and why they did what they did.
People always look for a narrative, and a good story is what essentially makes anybody interesting. The story of somebody like Obama or Steve Jobs is interesting, not just because of their past or current achievements, but because of the narrative that got them to those achievements. It's hard to say, definitively, who the most interesting person is. I think we all have our favourites, because of what those people's lives have taught us about our own lives. If forced to name such a favourite, I'd say the former British politician Tony Benn. Google him sometime.
Also, I'm not trying to be a dick but there's a typo in the title of this thread.
You almost described me, but it turned out I was lying about knowing all those languages.
Pics or it did not occur.