My parents gave me a Tag when I was 12, and a Tudor when I was 16, and a Patek at 21.. and other countless watches as I grew, and kicked up a big fuss wanting.
In hindsight, I felt they over-gifted me the Patek. I felt I was too young, too rash, too bold, to truly appreciate and understand the Patek. Now, being 27 years old, I feel that if he held out on my tantrums and demands long enough and gave it to me, it would be better. I am older, wiser and appreciative of what my parents gift to me.
Patek should be kept for EXTRA-SPECIAL milestones, or any other 'extra-priviledge/luxurious watch', and not simply gifted because of 'age' or 'accomplishment' which comes with time. I belive gifting a Patek too young an age brings a sense of arrogance and expectation.
Well, it's just my 2 cents worth!