I'm the Doctor. I'm a Time Lord, which is an alien to Earth--and why, exactly, are humans "normal"? It's just one species. I mean, a brilliant species, but not the standard. There's even a theory that Time Lords are the standard, considering how long we've been around, but I'm fairly certain the Time Lords came up with that so...possibly not the most accurate or trustworthy theory.
Occupation...traveller? Even if that's not really applicable anymore. "None", then.
I dunno if I can choose only one interesting thing. Or for that matter, what you'd consider interesting. Isn't it more fun to just...find out?