It really depends on individual taste. A Hollywood actress I like has natural D-cups, and I really like the way they look on her, but if I saw someone with fakes of equivalent size, I'd feel somewhat less attracted - but still attracted though. Her stature is tall, her body not large, but not skinny, just large enough for her height, so the boob size looks perfect.
A smaller girl, about 5'5" or less would look better with smaller boobs. So I guess the smaller women are, the more natural smaller tits would look on them. It's a matter of proportion and personal preference.
Funny, my favorite JAV goddess has fake ones, and I view them as an essential part of her, not small, not too big. And maybe I prefer boobs that don't flop around as much as natural ones do - probably to do with my personal muscle fetish.
They look okay when wearing a sports bra or tight top, and even with a bikini or lingerie.
How about when they are free, do you think they look good on her? Probably depends on what you like, I love them. The symmetry is off with the nipples when they are hanging in certain positions, but I always overlook that since most of the time they are in proportion to her figure.
Maybe they look smaller from certain angles, like when she's on her back, and they rest more flattened towards either side of the chest, while when she is sitting/standing upright, their bulbousness is more noticeable - but they are very big and round, regardless. Still better than F-cup whatever sizes the huge ones people complain about are.
