Formal:
* 私 (watashi): This is the most common and polite way to say "me". It's used in formal situations like business meetings or when addressing someone older or higher in status.
Informal:
* 僕 (boku): This is used by men and boys in casual situations with friends and family.
* 私 (watashi): Can also be used informally, but it's less common than 僕 (boku).
* 俺 (ore): This is a very casual and masculine way to say "me", used mostly by men among close friends. It's considered impolite in formal situations.
Choosing the right word:
* Consider the situation: Are you speaking to someone older or in a professional setting? Use 私 (watashi).
* Consider your gender: Men typically use 僕 (boku) or 俺 (ore) informally, while women generally use 私 (watashi).
* Consider the level of intimacy: Use 俺 (ore) only with very close friends and avoid using it with strangers or people you don't know well.
It's important to choose the correct word based on the context and your relationship with the person you are speaking to.