For me,it would be someone from the bratty,rebellious and dominating types,at least the ones that are currently in the game.
I just wait to see how are the new ones when they come out,but i like the goth,tsundere and yandere ones from what i seen.
By the way,do you or anyone else get more types than the others,because I get more bubbly or quirky ones than others.I have a town with 30 bubbly and 5 quirky ones and a few others,but the towns are generally bubbly types.