Secret of Mana. My older brother and I didn't own a SNES growing up, but we played a large chunk of it three player at a friend's house when we were kids, and for years afterward we thought it was the best thing since sliced bread, and dreamed of being able to play it again someday. So it was pretty much the first game I looked up when I first found out about emulation back in 1999-ish. I wound up playing it with my younger brother rather than my older, though, as my older was kind of tiring of RPGs by then, while my younger was just starting to really get into them.