There is no such thing as a best parrot as it all depends on the size of the parrot, colours, personality, etc.
For a start most babies are cute little loving personalities that change usually as soon as they hit puberty. The adult parrot is the one you should be doing all your research on as this will be the end genetic result, with the owners and environment finishing off the mix of behaviour.
It's important to note that each and every Parrot has its own unique personality, and the suitability of a particular species as a pet can vary depending on individual preferences and circumstances. Proper care, socialization and training are essential for a happy and well-adjusted pet Parrot.
Make sure you consider factors such as your lifestyle, living situation and the amount of time and effort you can dedicate to their care.
Each Parrot species has their own care requirements, temperaments and characteristics, so it's crucial to research and understand the specific needs of the species you are interested in.
Additionally, spending time with different Parrots and interacting with them can help you gauge their personalities and determine which one would be the best fit for you.