The Lucky Star girls become adults by the end of the show, and there are 3 out of like 20 of them that get comments for "big" breasts, and even those are kind of middling (not counting that strangely "enhanced" Haruhi ad in the show, that's bigger in the ad than she is in the show)



So, yeah, there are plenty of anime with outrageous sizes, plenty that are full of flat chested, girls, and a fair few right in the middle or that run the gamut. School Rumble's a good example of this. In fact, it may be easier to name the ones that run the gamut than ones that are just over the top. I think you only remember the ones with the gigantic breasts because they stand out more than normal looking characters. You have no reason to pay special attention to more normal looking girls on anime.