Heh, I played Pokemon Crystal during the long rides and flights in the USA on my iPhone.
Bit out of boredom but also nostalgia.
First played Pokemon Blue when my grandfather bought it for me when I had my blind gut removed (was a disaster by the way. Sat in hospital for over three weeks.) Thank god I had that Gameboy. I think I was seven years-old at that time.
Amazed by the Pokemon world, I later bought Pokemon Yellow, Gold, Silver, Crystal, Sapphire and Emerald. Even that Trading Card Game for the GBC was awesome.
Pokemon Blue is still my favorite. Never liked the Pokemons which came after. Those 150 were perfect, and the game was still a bit difficult back then.