Following on from the auntie/uncle debate, I'm curious, what do you call your grandparents?
For my dad's mum, my sister and I never switched to 'Nan' from 'Nanny' as we grew older, and I have seen friends raise their eyebrow when I've referred to her as such.
My mum is 'Tush' to my son (due to baby's funny but incorrect attempts to pronounce her first name), but Nan to my nephew. I don't really want our future kids to call her Tush. And I don't like Nanny (especially as we may end up employing a nanny...).
I like Gran, but not Granny or Grandma. H's mum will be Grandma, as she is to his nephews.
It's all a bit complicated... ?