Probably Donkey Kong Country on SNES, good times (I know use that game for speed run testing, got it down to 54 mins to finish the game.)
However looking back on it, one of my favourite games of all time was Secret of Mana, and was also about the 5th game I ever played, but I didn't love it then as much as I do know, I guess its hard for a 5 year old to really get into a JRPG.