I think that my thinking changes depending on the language I am currently using. Bulgarian is my mother tongue and, when I speak Bulgarian, it is 100% me. I have studied English for work and I call my English "my fighting language". Maybe it is not perfect but I use it to influence those around me and actually to change the world. So, I am more direct when I speak English and the barriers of my mother tongue partially disappear.
My Russian and French are both school languages with broader vocabulary but more distant to me. I hope that, one day, they will be as much connected to the reality as my English is.
I definitely believe that languages shape the way we think - not our thoughts but the way we express them.