Well, I met a Greater Jardine at a rescue. He was 15 years old I think, and he could say his name, and make sneezing, coughing sounds, and "raspberries" like with your tongue. He stood up for every one in my family's hand, but he felt most comfortable with me, so that's why I'm ambivalent. Very very beautiful and cute bird. He nipped me a few times when I pet him in the "wrong" place, but he liked head scratches. She said he was generally quiet as well.
He was beautiful, and I loved his color, and his wings. Therefore, I don't get why they're not more popular, especially if what everyone is telling me is true about their personalities.
I'm highly considering him as a family companion bird, but since it's a huge commitment, I'm not sure. He was also very very healthy looking. The rescue I went to takes impeccable care of their birds, and its super clean.
They also showed me a very cute Goffin cockatoo, but he was a screamer. Supposedly he had been returned back to the rescue a few times. My husband adored him (he has a soft spot for cockatoos). That bird had so much personality, but the screaming was off the charts, even for a Goffin. Poor little guy, if only he was a bit quieter, he would be adopted in two seconds. Sweetest happiest little bird you ever saw, and loved all people.