These are listed from favorite to least favorite.
Love
Otomachi Una (Owns Spicy/Sweet)
- I love Spicy, Sweet, and Talk equally
Megurine Luka (Owns)
-Megurine Luka V2 English (Owns)
-Megurine Luka V2 Japanese (Owns)
-Megurine Luka V4X English Straight (Owns)
-Megurine Luka V4X Japanese Hard (Owns)
-Megurine Luka V4X Japanese Soft (Owns)
-Megurine Luka V4X English Soft (Owns)
Luo Tianyi
Hatsune Miku
-Miku Append Dark
-Miku Append Soft
Gumi Megpoid
-Gumi Natural
-Gumi Power
Gakupo
Mayu
IA
Tonio
Fukase
Like
Kagamine Len/Rin
Tohoku Zunko
ZOLA Project (More specifically KYO)
Kaito
-V1
Meiko
-V1
Yukari Yuzuki
Cyber Songman (Owns)
Hatsune Miku (English) (Owns V4X English)
-Hatsune Miku V4X English (Owns)
-Hatsune Miku V3 English
Avanna
ONE
Kaai Yuki (Depends on song)
Aoki Lapis
Big Al
Oliver
Hate
VFlower
Kaai Yuki (Depends on song)
YOHIOloid
Hatsune Miku
-Miku Append Solid
The rest are neutral.
Love
Otomachi Una (Owns Spicy/Sweet)
- I love Spicy, Sweet, and Talk equally
Megurine Luka (Owns)
-Megurine Luka V2 English (Owns)
-Megurine Luka V2 Japanese (Owns)
-Megurine Luka V4X English Straight (Owns)
-Megurine Luka V4X Japanese Hard (Owns)
-Megurine Luka V4X Japanese Soft (Owns)
-Megurine Luka V4X English Soft (Owns)
Luo Tianyi
Hatsune Miku
-Miku Append Dark
-Miku Append Soft
Gumi Megpoid
-Gumi Natural
-Gumi Power
Gakupo
Mayu
IA
Tonio
Fukase
Like
Kagamine Len/Rin
Tohoku Zunko
ZOLA Project (More specifically KYO)
Kaito
-V1
Meiko
-V1
Yukari Yuzuki
Cyber Songman (Owns)
Hatsune Miku (English) (Owns V4X English)
-Hatsune Miku V4X English (Owns)
-Hatsune Miku V3 English
Avanna
ONE
Kaai Yuki (Depends on song)
Aoki Lapis
Big Al
Oliver
Hate
VFlower
Kaai Yuki (Depends on song)
YOHIOloid
Hatsune Miku
-Miku Append Solid
The rest are neutral.