However, some would say I still don't really sound that natural and that's probably cos I had been speaking my second and third languages quite often these past 7 years. Actually during my stay in Japan, I used my first language less compared to my second and third languages, English and Japanese respectively. So as if I sounded "proper"
The thing is, what I have noticed the most is that I look shyer as if when I speak in Japanese and I wonder if it's the influence of the personality of most Japanese people (or my perception of it) which also influences the nature of the language itself. One of my best friends who is from an English-speaking country said that she feels she sounds more girly when she talks in Japanese and was told by her sister even that she sounds less sincere *ouch*. For one I do notice that I use higher pitch sound when I speak in Japanese and probably that's just imitating well or more of adopting after observing how Japanese women speak when they speak in Japanese when I lived there. Same happens to the same friend.
I do feel that I sound more direct and as if more confident or probably more assertive when I speak in English and definitely in my first language which is one of the Asian languages as well.
However, if I would like to talk about topics that can be quite emotional, such as expressing how you feel, I find it easier to do so in English rather than in Japanese nor in my first language, and I wonder if it's again because of the nature that in Asian languages there are not that many expressions to express our emotions or feelings as we don't really do so so explicitly. For one, my own parents during nearly 20 years of marriage only got to say the sentence "I love you" to each other only once and that was only in the wedding ceremony.
On the other hand, I wonder for people who speak more than 1 European languages don't notice such personality change apart from maybe some loss of wits just becos of lack of vocabs etc.
So the question is do you notice any personality change when you speak your first language and your second or so language and what kind of change is it?
Oh and before anybody bothers to ask what first language I speak, please don't hold your breath... as I won't tell here in public anyway. As open as I can be, I am quite private with these things.
Plus I don't reckon it's that important as I'm asking more on what you notice from the languages you yourself can speak.
Cheers.