как правильно: It's important to me или for me?

http: //www. usingenglish. com/forum/ask-teacher/51751-important-me-me. html - уберите пробелы после точек
http://www.englishforums.com/English/ImportantToOrImportantFor/dnqhx/post.htm
http://forum.wordreference.com/showthread.php?t=1775292
На этих форумах отвечают носители языка.

Both "for" and "to" can be used after "important," but not usually in the same situations. For example:

!!! It is important to me that you arrive on time.
!!! It is important for me to arrive on time.

!!! In the first case, it is YOUR arrival on time that matters to ME; in the second it is MY arrival on time that is important.

Important + to
"Studying is important to me" (you feel it)

Important + for + infinitive
"It's important for me to learn English because... (leads to something else)

It is perhaps also important to note that, in both the above examples, “it” is a syntactic expletive (“dummy pronoun”) which, in reality, has no meaning.

!!! When “it” represents something special or something that holds sentimental value, then you use “to.” For example, if your grandfather gave you a watch, you would have to say “it is important to me.”

!!! When “it” stands for a certain object or activity that is physically or emotionally beneficial, you use “for.” For example, if you are emphasizing that eating nutritious foods or getting enough exercise is healthy, you would have to say “it is important for me.”

Вывод: оба предлога возможны. Нужно учитывать ситуацию.