I got Blue when I was about 4 but I never really played it. (Honestly, I couldn't even get past my ROOM just because I liked the sound of bumping the walls . Yes, I was a strange child back then.) All of my Gen. 1 nostalgia comes from Stadium because no travelling was involved.
I was four when I first got my first Pokemon game, a Blue version with a Gameboy Pocket that my mom had found in our hotel room.
I've been hooked ever since.
The worst part about starting playing when I was four was that I could not read efficiently yet, and never even made it to Brock on my first file (I did not know that I needed to bring the Parcel back to Oak).
I was 11 years old and I had originally wanted to buy the Blue version because blue is my favorite color, but Toys R'us were out of them so I had to settle for the Red version instead. A few weeks later when my friends were all saying that Red was the cooler game over Blue because it has the coolest pokemon on it's cover (Charizard) I wasn't so upset about settling to buy the Red version anymore .