Dragon Warrior I, when I was 9 years old, I could read just good enough to understand what was going on so it had a huge influence on my brain at that young age. Since that point on I appreciated games with stories and I have pretty much loved RPG's since.
I was also obsessed with leveling up and beating all the new monsters. It was all so original back then that it really blew me away. Of course now that I look back at the game and compare it to the new ones and it seems so small and simple but it's so classic... everything about DWI was classic. Because I was so young when I played part I the nostalgia is overwhelming when I play any new DW/DQ games.