Hey! This type of stuff always throws me too... I was dreading writing the "talk about yourself" section and I'm probably not 100% happy with it but ohhh well...
I'm currently based in Europe so I wrote a bit about that. I wrote about my experiences from being in a new place/culture, finding friends in a new place, learning a new language, etc. (while trying to relate these new experiences to my personality, i.e. a social person..). I also wrote a few lines on being an active individual (e.g. ex-lacrosse player, dog owner, kite-surfer, etc.).. I didn't touch at all on insecurities but did mention a little on the challenges relating to being in a new country. I mainly attempted to focus on how the things I touched on are part of my personality outside and inside my professional life. Hope this helps!