Final results...
🕑 Added 2021-10-08 06:44:06 +0000 UTCFirst I'd like to say thank you so much to everyone who voted, I had such a rough time picking hairstyles and your help was invaluable!
Here are the results from the poll:

Out of these, I have selected 3, 8, 2 & 5. As much as I like 1, I am leaving it out in favor of 5 in order to offer four different kinds of hairstyles; one loose long hair, one short hair, one braid and one long half-updo.
Here are the final four hairs that will be available for the new version of Serana:

I am incredibly happy with the final choices and I hope you see at least one option you like - personally I'm not sure I can pick a favorite!
The update should be up sometime next week, maybe two as I'm working on some other things at the same time.
Comments
Pandorable
I love that! One could also use a certain wig mod for some variation ;)
John Barry
I liked one too
Kevin Quealy
Awesome! The three longer hair styles all work together. One could reinstall the mod to have her hair pulled back when you meet her, put into the tight pony tail when traveling, and hanging loose when at home. Make Skyrim a little like Sims 4.