Thanks for the replies. I hope this will be a popular thread. Feel free to share images of other girls we haven't mentioned yet. In particular, I've been wondering about yet-unknown characters from upcoming shows. I don't have my finger on the pulse of new anime like some do.
Yes Vlad, Mii shows herself off more than Chiharu. But Eiken OAV 2 looks to be set on a beach, unless the DVD cover deceives. We'll find out soon enough.
I see no one's voted for Nanako yet. I don't really like her myself, I just included her because she was a somewhat high-profile representative of anime fanservice from the past few years. But I don't think she's attractively drawn, her breasts look like triangles rather than anything physical. And her personality is vapid and bungling. I guess I just didn't find the show appealing in general.
Mii has definitely been my favorite for a long time, but I voted for Chiharu because she's more interesting at the moment. My favorite thing about her is that she's still growing throughout the series. But Mii, I think, was a much more audacious creation. Eiken is flagrantly all about breasts, and was made after Jungle de Ikou (at least the OAV, I'm not sure about the manga). JdI, on the other hand, was born in a more innocent time. It seemed to reference Ranma 1/2 more than anything else, but carried that show's light but sometimes strangely inappropriate fanservice to a startling extremes. It wasn't blatantly satiric and self-conscious, like Eiken. Rather, it was just another "Ranma 1/2," one decisive shove towards gleeful perversion. When Mii shows up at the end of each episode, the effect is jaw-dropping. She simply doesn't seem to fit...
Mizuki is another recent favorite. I don't care for her character or the show very much, but for a second-tier character in an ensemble show, she's absurdly large-breasted. I mean, she would be absurd as a main character as well, but in her less important role, the decision to give her massive juggs seems more offhand and gratuitous. She has some pretty good moments too, particularly in Gravion Zwei episode 3, which takes place at a hot springs resort.