My dad was bald, and I had a great hair growing up (think of Daniel Radcliffe in Harry Potter, I was actually getting that comparison for some reason) which wasn't so common in Egypt.
My older sisters who were 7-9 years older than me used to tell me I've awesome hair, but too bad I will lose it since my dad is bald. That made me growing up obsessed with my hair. At the age of 5 no kid should worry about hair loss .
I noticed a very very slight hair loss at the age of 15 in my temple area, that should have never been noticed. I continued to lose hair gradually at hair line till the age of 22-23 when I started to lose hair thickness.
By age of 29 I would say I looked bald rather than balding, at early 30's I am seriously thinking about HT