My dad got me into them with Dragon Quest and Final Fantasy, though as the years went on he lost interest in the genre as they got less about gameplay and more about storylines. (He was never fond of the Japanese RPG plots I suppose; can't truly blame him for the most part)
I remember after school for a long while we would play Zelda 1,2 (not rpgs, I know) and then Dragon quest 1~4, followed up by Final Fantasy 1 and 4. After that point I was pretty much playing them on my own entirely, as he lost interest in the genre after FF4; though he still was interested enough in Zelda and a few others that we played around together sometimes.
I remember last year I finally got him to play OOT and Majora's Mask because of the bonus disc that came out for the gamecube. Couldn't get him to try much past those, though.
I don't remember how old I was exactly, as I didn't play them right when they came out (well, I did try DQ4 and FF4 right when they came out, but not the others) but I was pretty young. I still remember those times fondly cause outside of that me and my father never really had a lot in common, so those were the only times we ever really spent any quality time together. Hard to believe it's been so long.
Jam it back in, in the dark.