that's a very good subject M.
I think criticism is really dangerous, some people can't handle it and they get so insecure that getting a lot of criticism sometimes ends in depressions or anorexia or diseases like that.
fortunately i'm not like that and when i get criticism of people that i love and i think they're opinion is very important i will actually try to do something about it. When i get criticism of people which opinion i don't value or i dislike, i won't pay much attention to it, although i would get a bit hurt probably.
when i give criticism i always try to say something positive first, but to be honest i'm not really good in that
. I sometimes say things that i regret and i try to think about my criticism before i actually say it to the person it's against.
i'm curious to other peoples opinion about this subject as well!