Personally, I adore breasts of any size, so long as they are natural. Breasts that are large and saggy are fine, though flabbily saggy breasts are less attractive. Small breasts can be beautiful if they are nicely shaped. Puffy nipples are a plus, but I have loving memories of a girlfriend whose big, bouncy, easily stimulated breasts proudly displayed inverted nipples.
I can be (and repeatedly am) turned on by natural breasts of any size. Indeed, I remember an occasion, during my first marriage, when I felt quite turned on by a young woman who was unabashedly flat-chested. A professional colleague, she was a "hard body", an exercise fanatic. My recollection is of a committee meeting in which she was wearing a snug-fitting T-shirt and no bra. The T-shirt clearly revealed puffy nipples, which were slightly elongated horizontally, and I repeatedly found myself having to drag my eyes away from her chest and stop thinking about what a pleasure it would be if we could be alone and she let me remove her T-shirt and suck on those puffy nipples!
Supporting the point of my feeling that all kinds of (natural) breasts can be attractive is the fact that I was happily married for over 25 years to a woman who wore a 36B bra. I loved her pert, upturned breasts that never sagged, even when she was in her 50s.
My second wife wears a size 34G bra, and her bountiful breasts are the most beautiful I have ever seen, either in person or in photographs. But she dresses very conservatively, and I was already seriously interested in her even before I realized how spectacularly bathykolpian she is. We've been in a monogamous relationship for over 22 years now, and at a little over 60 years of age, her breasts hang lower but her nipples still point forward and slightly up.
When we make love, she is usually, by mutual preference, on top, a position in which I love sucking on both her nipples simultaneously. This ordinarily happens after I have earlier brought her to orgasm by fingering and sucking her nipples while we lie side by side, and/or after she has climaxed from cunnilingus, during which I love to look up at her breasts. When she lies on her back, her breasts, being natural, spread beautifully outwards; and while tonguing her I can see them rising precipitously from her ribs like two rounded mountain peaks with a broad valley between.
Hurray for beautifully breasted women, of ALL cup sizes!