That is incredibly subjective, as your "regular" can easily be either too small or too big to someone else. As such, i took the liberty to interpret it as "i prefer girls with tits that don't constitute half of their entire being".
Here are my top 10:
Oboro (Taimanin Asagi)
Ingrid (Taimanin Murasaki / Taimanin Asagi / Makai Kishi Ingrid)
Igawa Asagi (Taimanin Asagi)
Annerose Vajra (Koutetsu no Majo Annerose)
Delva Celebrian (Youkoso! Sukebe Elf no Mori e)
Evelyn Celebrian (Youkoso! Sukebe Elf no Mori e)
Celestine Lucross (Kuroinu ~Kedakaki Seijo wa Hakudaku ni Somaru~)
Olga Discordia (Kuroinu ~Kedakaki Seijo wa Hakudaku ni Somaru~)
Kamimura Akiko (SISTERS ~Natsu no Saigo no Hi~)
Cala (VIPER-RSR)
To be fair, there are way too many girls i like, but i aways end up thinking of these.
These are my top 10 I didn't really take boob size into account only about maybe 1/2 have big boobs and only 1 of them I feel have boobs that get close into the territory of being too big
# 1 & 2 are tied
Erynn from Interwined
Bella from Summers Gone
Charlotte from Hillside
Allison from Race of Life
Eliza from Eliza
Alexis from Interwined
Kaija from The Neverwhere Tales
Sage from Being a Dik
Zoe from on my way Home
Either Nicki or Risa from Friends in Need ( cant decide)