I sort faster in my head (except tiers aren't internally sorted).
Best girl and my waifu:
Yuugi
Great girls:
Yuyuko
Marisa
Reimu
Eirin
Seiga
Kanako
Suwako
Kaguya
Akyuu
Toyohime
Special mention for very cute airhead:
Meiling
Nice good girls:
Aya
Keine
Reisen
Komachi
Suika
Yuuka
Alice
Patchouli
Kasen
Nitori
Ran
Youmu
Iku
Tenshi
Cirno
Mokou
Remilia
Wriggle
Shinmyoumaru
Utsuho
Nazrin
Futo
other Reisen
Just cute:
Sanae
Sakuya
Chen
rest of the fairies
Kosuzu
Seija
Wakasagihime
Lunasa
Lily White
Rin
Tojiko
Mystia
Momiji
Respectable but don't click with me:
Eiki
Byakuren
Miko
Tewi
Yorihime
Yukari
Mamizou
Edgelord/lolicon alert >:( still cute, but I can't deal with mentally unstable lolis
Flandre
Koishi
Satori
Forgot/haven't gotten to know/don't care:
Everyone else