Never once in the nearly 20 years that I had Prinny did she make that loud screech. I'm guessing she was never around adult princess parrots making that noise when she was hand-raised & so never heard it?
My princess was never much of a talker, but she did say her own name, copy the microwave, wolf whistle & make up other whistling tunes. She loved my toes, would talk to them & regurgitate food for them. One of her favourite past times was throwing birthday cards off the mantle piece, & peering over to see where they landed. She liked showers, if she knew I was in the shower she'd fly up the hallway to the bathroom to find me & get her turn. Always wanted tastes of anything we were eating/drinking. When my son was born she was VERY put out - sulked & did not make a single noise AT ALL for about 12 months - then one day out of the blue she started whistling & chattering in her cage as if nothing had happened & she was back to normal from then on.
I loved that bird. I still talk to her empty cage (4 months later). But although she would let me pat her occasionally I would not say she was a cuddly bird, & she never liked scritches. Princess parrots have those beautiful long tails...I'm a sucker for a bird with a long tail. You do have to get a bigger cage than you would think to have plenty of tail-space though.