What age do you consider old...

Hmm, maybe 80 or 90? But that will probably change when I get into my 60's or so. It's funny, but I never considered my parents old, even when I was a kid. But then, I grew up with my Grandma (my mom's mom) in the house and helped take care of her, so I guess my perspective was (and is) somewhat different from most other people's (at least most other people I know).