Santa never came to our house - not even Hanukkah Harry did. Presents came from parents, whether you had been good or bad.
I do remember, though, my son asking me if the Tooth Fairy was real. I hesitated. "Do you want the truth?" I asked. "Yes," he insisted. "The Tooth Fairy is mommies and daddies," I told him.
He was not happy with this answer, and I was not happy giving it to him, but I felt strongly, and still do, that when you are asked a direct question you have an obligation to answer truthfully, even (especially) with a child.
For the record, I had never actually told him there WAS a tooth fairy. I put money under his pillow, of course, but did not say where it came from. He learned about the tooth fairy from friends at school. I was willing to play along. My own parents had simply handed me money when I lost a tooth; they did not want to feed into any superstitious nonsense. I was pretty upset by this. I knew perfectly well that there was no tooth fairy, but geez, couldn't they let me have the fun of putting my tooth under the pillow like everyone else?
I wish I could ask for his opinion in retrospect, but my son has no memory of this conversation, or of ever believing in the Tooth Fairy (or Santa Claus).