I used to call Mrs. Bee by her first name: "Bee". But then Charlie started calling out "Bee!!!" when he wanted her to come.. Seriously Charlie... don't you think that's a bit inappropriate?
So now as much as possible, I avoid using Bee's name. I call her "honey" instead. For a while, I tried calling her "Mommy" because that's what Charlie calls her... but let's be honest, that's a bit weird. I just couldn't do it.
What about you: does your LO call you by your first name? If not, does your SO have another name that he or she uses when he wants to catch your attention?