No, it's not just because of that. Or it could be that you manage to convey your perception of her in your photos.
Anyway, I think I'm becoming a little bit of a fan of your daughter's. Firstly, kids do not all do addition at the age of two and they aren't all as photogenic as her. She's been through a lot because of her health issues but seems to be taking it really well for her age.
This is something I try to do when I take photos as more important than the quality, is the moment and meaning of it.
I am her biggest fan I think. I am dreading her growing into an angsty teen.
Of course, you are.
Life is unpredictable but I think she's well equipped to deal with that.