You didn't ask me, but I am compelled to answer because its an interesting question, and, well, Russian is my native language. Till the age of eleven, I was es

You didn't ask me, but I am compelled to answer because its an interesting question, and, well, Russian is my native language. Till the age of eleven, I was essentially speaking only Russian. They did teach us some pretty rudimentary English at school, just enough to ask for directions in a foreign country. Then, my family moved to Canada, and I had to learn French. It took about 2 years to attain a native-level proficiency. Then, I learned English as a "second language" (actually third, of course) here in Canada. French is the language I use most. Thus, my largest and most precise vocabulary is in French, and this is obviously the easiest language to express myself. However, I don't feel constrained by a language while talking/writing in English or Russian. Worst case scenario, I have to turn to Google to translate some precise French word when the English equivalent does not come fast enough. In general, I think in whatever language I am using at the moment, and the best ideas can come in any of those three languages.