Thanks for a great collection. My vote is for big boobs, but you posted some very nice B-cups.
Boobs size isn't everything, Big boobs are often on fat women. But I care not at all about the typical or average or statistics. In both real life sex/love and JAV, what I care about is either that someone or that someone on the screen. Either way, I'm seeking an exceptional one: the one woman I love, or the few hot girls on the screen. So given we already pre-selected a beautiful girl, then bigger boobs (my preference D- to F-cups) is better than smaller boobs.
But even better is
more boobs, even the best pair of boobs in the world isn't enough. I want more! Even if I'm already with someone with a wonderful pair of D-cups, I can't stop desiring other boobs, even B-cups or even A-cups. On the other hand, larger than D-cups indeed have a lot of issues in real life, but for JAV and any casual encounters, come one come all!
And more than cup size, there are different levels of desirability, take your collection of small boobs: Saki Ninomiya and Rina Rukawa are wonderful. Something about their shape, their suppleness (which does come thru even on a 2D photo) the color, shape, size and arousal status of the nipple and areola. Big boobs are actually common, but beautiful boobs are not. I think the most common problems for ugly boobs are the shape of the teats and nipples.
Also I really love areola that swell to stimulation. Rina's swollen areola score a lot of points in the boobs war.
From your pix, I found Airi Kijima's tits to be un-appealing. If she and I are in the room with no alternatives, I might say to her "put your cloths back and and just open your mouth".
