Clearly, after reading some of the posts on this thread "perfect" is a subjective term. But here are some of my favorite pairs of boobs...
Nikki Nova
Premium Link Upgrade
Gianna Michaels
Premium Link Upgrade
Maria Ozawa
Premium Link Upgrade
Dylan Ryder
Premium Link Upgrade
Nina Mercedez
Premium Link Upgrade
...all shapes and sizes; real or fake doesn't matter to me all that much.