Hm.. I feel no difference there between my native language and English. I use the latter every day, and everything I read (and I read a lot) is in English - I've only read two books in my native language the last thirty years or so. I don't feel any difference in how I can express myself.

However: I am kind of a different person when I speak English. My personality changes. Not for the worse though (and that's where I don't agree with the "and not in a nicer way", that's not how it is for me).