Addie wrote:... Either you have a pet parakeet who is your companion or you have a pet parakeet who is part of a parakeet flock. If there are other birds around, the birds will naturally want to bond with each other and this is the healthy thing for them to do, especially if you are looking to have baby birds in the future. In fact, birds that are kept as companions are actually not always the best parents since they have become detached from their wild instincts.
My only experience with budgies in the last 40 years has been with youngsters intended as breeders, so I know very little about pet budgies. But I do want to say that what you've described, Addie, isn't accurate for all birds -- though it certainly might be for budgies. However, it is what older breeders often say about birds other than budgies, so perhaps that's where your information comes from.
I've paired several types of pet birds without losing much "pet quality," meaning their affection for me. In most cases, I formed a bond with each bird individually, during his or her quarantine period. As soon as I introduced intended mates to each other, I stayed very much in attendance, handling them together usually so neither became jealous of the other's mom time. As their bond grew, I withdrew a bit, especially during nesty times when they seemed to want me to keep my distance. But whenever they ask to be picked up -- sometimes many times each day -- I'm happy to do so.
They love each other, they love me, I love them ... it's all good! Birds with whom this has worked very well are cockatiels, quakers, and pionus. It worked differently with macaws and amazons. These larger birds still loved seeing me, even when I was not bringing food

but they wanted much less physical interaction with me. Usually my attention was from enough distance that they could not jump onto me, or I scritched them through their cage bars.
Annie, I hope others with budgie knowledge will answer your question, but my advice is to form your bond with a new bird during a 30-60 day quarantine period, as your vet advises.
Paca