If you had to think of one character to represent the entire Oh My Goddess! series, who would it be?
Don't answer that. The question is rhetorical, and her picture is plastered up all over this page. Belldandy is the lifeblood of Oh My Goddess!--there's no doubt about that. It's her unique, innocent, caring personality that makes the series what it is. There are many other manga series about beautiful women who aren't of this earth coming to live with normal guys. Some, like Tenchi and Urusei Yatsura, you've likely heard of. Others, such as Boku no Marie and Mamotte Shugogetten! are a bit less well-known. While all of these series are certainly excellent in their own right, OMG manages to rise above the pack and stand on its own, with a feeling of originality that is somewhat lacking in all the others.
Of course, this can't all be attributed to Belldandy's personal touch--but a lot of it can. The most refreshing thing about Oh My Goddess is that Belldandy (in her current incarnation), unlike her counterparts in other series, is neither abrasive, nor stupid, nor impulsive, nor annoying. In fact, one is hard-pressed to name any bad qualities at all. As a result, Belldandy and Keiichi's problems usually come from outside sources--left to their own devices, the two of them would likely lead a peaceful, contented life together.