Ringnecks aren't always mean, and 'tiels aren't always nice, lol.
Quakers can be loud and become extremely territorial.
But we're here to talk about IRNs.
Hane is my little IRN. He's hilarious, attacks his swing, plays with ALL his toys, chews through rawhide, get food all over his beak, tries to bathe in his water, chases the dogs, pretends he's listening and makes little beeps and blurbles. He's adorable. ^_^
On the other hand he will only come out of his cage if I bribe him with a sunflower seed (we're working on that), doesn't like his neck scratched, and is afraid of large red moving objects.
As far as handling goes he steps up well, will go to family members to be picked up, and lets me flip him over onto his back in my hand. In fact, even through his biting phases (his worst was a whole month) he would let me flip him over. Maybe because I always said, "Woooohooooo!" when I flipped him back up, lol. I think he liked that noise.
The good thing about his biting, he only drew blood twice and very little at that. It's more of a really hard pinch, at least from Hane.
And he's not noisy, at least as I consider noisy. My male 'tiel is VERY noisy compared to Hane. And Hane is only ever noisy if he hears another loud bird, such as the wild quakers or my 'tiel (who is all the way downstairs on the porch). Occasionally he'll be loud in the morning, but I just ignore him and he fades off. Nothing I'm not willing to deal with.
I can honestly say an IRN will not be like your 'tiel. Even my 'tiel isn't like yours, lol. But it will certainly be an adventure to live with one. IRNs have spunk and personality. They make up games for themselves and entertain us- and like doing it! If you're willing to live with a tiny bit of challenge, then why not a ringneck? You'll never be bored, that's for certain.
I won't say IRNs are perfect little birds, no species is. But a bird can be perfect in his companion's eyes. It's good to be prepared and do your research, like you are doing now. Ringnecks may be loving, just not in a cuddly sort of way.
Hane will always be Hane. I'm looking foward to seeing how his personality changes as he ages. He's still got a lot of growing to do. Maybe he'll mellow out, or he'll always be a little ball of activity. Either way I'll be happy to have him around. ^_^