I or me?

It all depends on the rest of the sentence:

My father and I went for a walk.
My mother took my father and me for a ride on her snowmobile.

I and my father is correct. The other forms are very often used in American English, but are grammatically incorrect

Mark KI and my father is correct. The other forms are very often used in American English, but are grammatically incorrect

So Mark, are you saying that this is incorrect?

My mother took me and my father to the doctor when we both got sick.

Nope, wait: In the context of the sentence by anonymous, it is incorrect, like when you say you and me; do not say that, becouse they are both subjects of an action, and so the correct form is you and I. But in the example quoted by you, father and me are the objects of the action, this is why in this last one me is correctly used. Bye

AnonymousWhich is the most correct to say: I and my father or me and my father, or my father and me?

Your best bet is to use "My father and I" when it's the subject of a sentence, and use "my father and me" in all other cases.

CJ