Even though I was into Pokemon back in kindergarten, I didn't have a Game Boy until 2003, mere months after I stopped caring.(If I had gotten it 6 months earlier, I probably never would have gotten out of Pokemon.)
I didn't get back into Pokemon until 2009 when, due to a combination of nostalgia and recommendations from friends, I decided to get Pokemon Platinum. That was my first game. I picked Chimchar (female on first try without knowing how awesome that is). I was hooked from then on.