It depends on the bird for me. Our cag i talk to in different ways depending on what we are doing. If we are playing, its my usual playful voice, if hes being mean, its a stern voice. I have to admit when hes being a complete sweetheart, i have been known to baby talk, although i have yet to hear him use the same tone. The quaker doesnt seem to like the higher pitch when being talked to, she favors deeper voices and mimics them easier. The lori i use a higher pitch that she seems to respond better to. The tiel and conure dont talk...yet.