Charapedia recently asked female anime fans the question: Which anime series needs a sequel? You can view the male results here and the full results for this poll here.
Here are the female results:
10) Hoozuki no Reitetsu
9) Himouto! Umaru-chan
8) One Punch Man
7) Owari no Seraph
6) Free!
5) Gakkou Gurashi!
4) Gekkan Shoujo Nozaki-kun
3) Prison School
2) Akatsuki no Yona
1) Starmyu