I'm not afraid of death as much as I'm afraid of DYING. I don't want to die in a painful accident or suffer through an illness. And I don't want to lose my independence. That would...suck. I'd rather just die in my sleep or something. No specific age, but I'm not really in the mood to die any time soon.
Growing up with a mom who worked at nursing homes, and now working as a home care aide myself, I am sure that I don't want to live past the point of being able to take care of myself, whatever age that may be.
A woman who lived a few blocks away from me passed away last month at 106. She actually outlived her oldest two children. Her oldest son would be 89 if he were still alive - she got married at 15. I remember that she was a nice lady. She spoke Italian (she was born in Italy). I can't imagine myself living that long. Once you live that long, you start losing everyone around you - even those who are younger than you.
The oldest person in my country is an 111-year-old woman who lives in Sydney.
I don't have an exact number, and if I did, I'd be way too afraid to jinx it by sharing that with everyone, but if I got to choose when I died, I would want it to happen after my kids are grown and have families of their own (assuming I have kids).