I've started to dream in Japanese. I can't remember enough to know if it was correct Japanese, but still.
In Japan, you will meet a lot of foreigners that are linguistically snobby, who will shoot you down for not saying something in perfect Japanese. The snobbiest remark I ever got from one of these kids was, "don't even try," while I was trying to ask a woman to order us a cab and searching for the words to use. I let that one slide at the time cause the guy was drunk, but that type of stuff ain't cool.
But there are plenty of people that know tons of stuff about the language and never show off. Those are the type of people I hope to emulate.