I started playing the same time as my niece. She only has like 5 miis, but I have 40. I spend more time playing than she does, to keep up with all those miis. She barely plays, but since she focuses on those few miis when she does, her people got married faster.
I think the more you pay attention to them and level them up, the faster they'll start dating and stuff.
I think the more you pay attention to them and level them up, the faster they'll start dating and stuff.