you wanna know about me?
here: It was formerly regarded as correct to use I, he, she, etc. rather than me, him, her, after the verb to be, as in: it is I who told him. Since both I and me can sound strange in a sentence like this, it is better to use a different construction: I am the one who told him. The use of a possessive before an -ing form of a verb was formerly thought to be preferable to using me, etc., but now both forms are acceptable: he didn't like my/me having a job of my own.