Most greet strangers without fear, although there is always one baby that has to ponder a person's parrot worthiness before deciding they are okay to interact with. In fact, visitors are often taken by surprise when a clutch of babies vie for their attention and clamber for the best perch position on top their shoulder. Not necessarily so. I have met other Timneh babies that will be placed on a couch only to stand there with mild interest in that around them. We do not clip our babies wings until they have acquired self-confidence in their flying skills.
Confidence begets an extroverted personality, which is also true of human psychology.
African Greys seem to have a reputation for not enjoying their baths. We introduce our birds to a warm misting at fledgling age. Just a few drops of water is enough to rev-up our Timnehs for a bath as they raise their feathers, wings and stretch their necks out to catch the drops while making excited chortling noises. Again, introduction at an early age seems to be important. According to Hefton, in their natural habitat African Greys receive annual precipitation ranging from 100-200 inches, and are often seen bathing in waterholes.