I like both. I think they're awesome and I'd be very excited to meet one.
I've never met a
Nefertiti or
Nefertari, but I have met a Tiye! And I named a kitten
Nefertiti once. She was called Neffy but I imagine a human would go with Nefer? Or Tari for
Nefertari. Not Titi though, that would get too many "titty" jokes.