Charlie calls me daddy mostly, but sometimes he calls me dada (especially when he's calling Mrs. Bee "mama"). He's never called me dad, although that's what I'll suggest when he's a bit older.
Olive started calling me dada and daddy lately, which I love! She says it most when I'm downstairs and she's at the top of the stairs waiting at the baby gate... so if she's near the baby gate, I will actually start walking down the (circular) stairs in front of her so that she'll call for me by name! Then I play peek a boo on the circular staircase with her, and she dissolves into laughter!
Does your LO call you mama, mommy, mom or something else?