Not long ago I posted this discussion where other users were supposed to guess my age and ethnic background based on my profile pic and my mother tongue based on some recording of mine speaking in different languages: https://www.italki.com/discussion/165794.
I finally found some time to summarise this discussion in a blog post: http://lingotopia.blogspot.de/2018/03/whats-in-face-about-stereotypes.html.
Btw, this is the Facebook page of my blog: https://www.facebook.com/lingotopia.blogspot.de/.
Miriam, I enjoyed reading your blog post and listening your recordings. Congratulation on your new job position! :)