My first console was a PS2, but I honestly think that, being only 6-9 years old and couldn't buy my own games, my parents went out of their way to buy the worst games they could for it (I mean there's a few PS2 games I have that are decent, but these were ports of Gamecube or Xbox games so they were usually quite glitchy *cough*SonicHeroes*cough*). As such it never really appealed to me since I didn't know the PS2 had any good games and I didn't know what the internet was. Honestly I was just trying to find which system Super Mario Bros was for since I'd played that once years before and loved it.
Then I eventually got a DS when I was 8 i think and suddenly found what I was missing my whole life, I didn't realise that Nintendo games were for Nintendo platforms only, so from then on it's been Nintendo all the way.