Qual è la differenza tra おれ e ぼく e おまえ e きみ ?Sentiti libero di rispondere con un esempio.

おれ=I (for Man), not use in business.

ぼく=I (for Man/ boy), some men use on the business, it's acceptable but a little feeling young.

おまえ=You (Expression not polite, never use to the first meeting person, the olders and on the business scene. Expression rather masculine than feminine, and it often the case a man call his girl friend or lover or good friend to "おまえ", when he has a trust relationships to them, but there are also some men/women who dislike be called "おまえ".)

きみ=You(Not polite but OK for the nearly year/younger person. Frank. It become impolite expression if you call "きみ" to the olders or teachers or to the business persons.)
Not many Japanese use this expression in the conversations. Actually, I've never been called "きみ" and never met Japanese who call someone "きみ". However it often use in the lyrics in Japanese song.