In this example (not sure about the punctuation because I heard it):
When you get a new box, the question is do I keep the box or do I throw the box out - me personally I keep it.
How come the object form of I is used in the bolded phrase?
In this example (not sure about the punctuation because I heard it):
When you get a new box, the question is do I keep the box or do I throw the box out - me personally I keep it.
How come the object form of I is used in the bolded phrase?
This is a common way while speaking to add emphasis to the following I, in this case to the fact that the speaker actually does something ("I keep it"). I would not use it in writing (except for really casual writing) because it is colloquial.
It can be thought of as an ellipsis of a longer phrase, such as "for me", "as for me", "speaking for me", etc. (Sometimes these words are not elided at all.) In linguistics, it’s just called left dislocation.
These examples from the internet should help: