Well, I got to fly on planes from early age. And those were kinnda long-haul flights around former USSR. The variety of planes, connections at the airports, checking-in, runway views from airport windows - all started to get me interested.
The final "influential factor" was when in-flight from Yakutsk to Moscow on Aeroflot IL-18 (early 80s, now this route is flown by IL-62s, Tu-154Ms and IL-96-300). The plane was REALLY noisy and flight was long, with a stop-over or two. So, my mom wasn't feeling well and we had to call for a FA to get her a glass of water. FA also had to give her a medicine for headache.
While doing all this, she (the FA) must've noticed anxiety and curiosity on my face (I was only about 4 or 5 years old). She said: "Don't worry, your mom is gonna be ok very soon".
Then, she went somewhere and came back with an Aeroflot corporate postcard, with a photo of Tu-154 on it! "Here, it's a present for you. Kewl plane isn't it?" - she asked. I nodded: "Yes". Then she patiently explained to me parts of the plane: the three engines, wings, T-tail, landing gear (the plane on photo was taking-off) and also described how it compared to IL-18 we were on. I found it all fascinating.
These days, I can still remember her smiling in her strict, neat Aeroflot uniform.
I loved aeroplanes/aviation since...