Growing into your parents

When I was child, I did not use to like Tea. And I used to wonder how come my parents drink 3-4(maybe more) cup of tea/coffee in a day.

But, now whenever I fell tired in office, I need a cup of tea to keep me awake and work. 

There are other things also..

 Thinking twice before spending on myself.

Is this sign of growing up or growing into a parent