Who is the good,better and best in SNSD dia por Day?

Mine:(not biased)
Good-Seohyun,Yuri,Sooyoung
Better-Hyoyeon,Tiffany,Jessica
Best-Sunny,Yoona,Taeyeon (full of aegyo or cuteness)
My bias rank is:
1.Yoona
2.Yuri
3.Taeyeon
4.Jessica
5.Seohyun
6.Sooyoung
7.Hyoyeon
8.Tiffany
9.Sunny
I am not being biased in the rank..