Let's see...
I was 10 years old when I first got and played FF1 on the NES. Got it for christmas along with my own NES! Was one happy kid and loved the game ever since, with the exception of FF8.

Here's a date lis of when I first played a particular FF game...
FF1 - 1990
FF2 - 1999
FF3 - 1999
FF4 - 1993
FF5 - 1999
FF6 - 1994
FF7 - 1997
FF8 - 2000
FF9 - 2002
FF10 - 2003
FF10-2 - 2004
FFMQ - 1993
FFT - 1998