Greetings

I anwsered that Question.

①I almost always say "ohayou" ,"oyasumi","itadakimasu"or"gotisousama" so on.

②Yes.　I think when I greeting someone in society, good impression for other people.

③No. I almost always same greeting opposite sex people.

④No. I think it is very ashamed and unused.

And I analyzing my first name.
One of my Chinese character meanings The Blessed Virgin.
The Chinese charaster use this meaning in China.