My DD is obsessed with her daddy and he is definitely the favourite despite me having the milky goods! I put it down mostly to the novelty factor as she sees me all day and also I am no fun because i don't spend all my time playing with her, i have to get some house work and other boring stuff done wheras dad is all fun and games. I try to just enjoy it and see it as a bit of time to have some timeout or time to get some things done. She always wants to play with dad when both of us are around and she will say "daddy play" and if i go to play with her she will cry! I figure she may go through different phases of this as well? Am hoping I might be the favourite in later years? Lol!
I think it is normal and no reflection on you whatsoever