What do you think about me wanting her to call me daddy?
What do you mean? Do you mean this in a sexual way?
Something like that, I want her to be like my daughter.
Being called 'daddy' isn't an uncommon request for men to make of women. It's rather common in a sub/dom type of relationship.
I wouldn't mind at all if she said yes. This sounds a little strange saying it out loud though.
It doesn't seem like you're into a very rare fetish, as a lot of men enjoy this same thing. You're not alone, and it isn't really as weird as you are thinking it to be.