Yeah, sooner or later, you will evolve. ;-)
When i was young, all my reference were in imperial system. Now it's pretty mixed. I still use inchs/feets when i talk about the height of something/someone. I use inchs when i design/cnc stuff but i better like metric when i'm doing engineering/physics, i use km and L/100km.
I speak english, but if i saw you, i'll only speak in french to you ;-)