1. Triss.
2. Yennefer (very closely tied with Triss, but Triss fits my personality more I'd say)
3. Kiera
4. Ciri (as Geralt it would be a clear NO, because he is a father figure. As myself, probably would be number 3.
Triss is just perfect for me though. He voice is so elegant and lovely. She's someone who I could see myself in a long-term relationship with.