My parrot experience includes a Noble macaw, Illiger's macaw and RFM. I also had Cockatiels and a Solomon Island Eclectus.
Such a variety of parrots have lived with me. I learned early on I am a macaw person. I LOVE macaws and realized I need at least one macaw in my life. Right now my macaw is Valentino a RFM which is the smallest of the large macaws or the largest of the mini macaws. They never agree on what the RFM is.
I had a Illiger's macaw from 2002 to 2011. Diego was my first bird I purchased across country and back then I flew out to California to take him home. Diego's personality was very fiery and he was willful. Between the Noble, Eclectus and him Diego had the strongest personality but I really liked that about him. He was bonded to me but tolerated everyone else even though I took great pains to socialize him with other people. I have been told more than once that while I had my three boys I favored Diego.
The Illiger's is very different than the Hahn's. My experience with my Noble and knowing a lot of people with Hahn's is that the noble macaw is so much more mellow than the Hahn's. Mihijo never once bit me and anyone could handle him especially if you had food. My Illiger's was not as food motivated as the Noble or Eclectus and it took me longer to teach my Illiger's tricks and correct behavior issues. When I took Diego to bird club meetings I would always have to sit way in the back because the little freak use to heckle the speaker. It was so embarrassing.
Diego was very affectionate with me. He use to like to cram his little body up under my chin shoving himself against my neck. His feathers use to tickle my neck as I have always been ticklish there so it took me a good long while to be able to tolerate the constant tickling Diego's feathers caused me. He would coo and serenade me while cuddling especially when I went out of country for two weeks.
My Illiger's grew into a very beautiful colorful mini macaw. His colors were vibrant his plumage shiny with excellent diet. However I lost Diego to a massive stroke that killed him within only 45 mins. I took his death very hard because I felt his stroke was caused by his diet. I have done extensive research and talked to many experts across the world to learn about heart disease in parrots. I learned with diet changes and CBC numbers feeding hot peppers to any parrot that will eat them helps keep cholesterol low and heart disease at bay. My Valentino gets 4 to 5 different hot peppers in his fresh mix. He LOVES all peppers hot and sweet.
Because of Diego I cannot bring myself to get another Illiger's. Diego was co-parented between the breeder and his parents. This was instrumental for Diego to understand he is a parrot so he had a bit of a "wild" streak which I called willful. There will only be one Diego. I do recommend Illiger's macaw for experienced people only. I don't think you would love a mini macaw because you loved your conure so much and they are somewhat similar in behavior.
As for the exceptional behavior and personality of the Noble macaw I can only go off of my Mihijo. He was a one in a million parrot which was never aggressive or nippy. Anyone could handle him, even responsible children. Anyone could take Mihijo out of his cage as he only cared about coming out and was never possessive of his cage. Mihijo was nearly the perfect parrot but because of his personality and intelligence. I had adopted a abused Noble macaw and I could still see a lot of what I learned as "noble macaw" behavior but also had issues because of the abuse.
The only parrot I think is the closest to a Noble macaw would be the Golden Conure. Very affectionate, intelligent and even though they are considered loud they have the CUTEST call ever. I think compared to how loud a RFM is I could handle a GC.
I do not have any experience with a yellow collar (If I could find one I would love to have one) or the severe. Everyone I know that has had or has a severe love them but they are difficult to keep socialized properly.
For my experience I want my second parrot to be either a Panama Amazon, Golden conure (not very likely but can dream), Yellow collar (hard to find one), and if I am crazy enough BTM.
Can you find the Illiger's
Such a pretty parrot