Ah! My Goddess (or Oh! My Goddess) is a very tame but charming series. It's one of the few anime/manga that you could likely share with the family without any risk of embarrassment.
I was a big fan back in my formative anime watching years, mostly because of the original OVA which, in my opinion, is somewhat better than the TV anime. Some of the characters, particularly Skuld and Urd are quite interesting and the way this universe works is also equally interesting. Basically, it's based on Norse mythology except that everything in heaven is technologically advanced. The Earth is run by a massive computer. Skuld, the goddess of the future, actually has a giant hammer that she uses to "debug" the system by literally squashing bugs that manifest in the form of cute rabbits with spider legs. You get the idea.
The more recent TV anime is more faithful to the original manga. It has great animation and character designs inspired from the movie. However, the show is also pretty boring with episodes where little of significance actually happens.
I have a very nostalgic love for Ah! My Goddess but in hindsight I think it's mostly just charming and forgettable. Belldandy, the main goddess in the series, is the poster child for boring waifu perfection characterization. She basically only cares about Keiichi, cooking, and cleaning the house. That's it. Even though she's the second main character she was by far my least favorite.
A similar series is You're Under Arrest also comes from the same author. It's about female cops and is equally tame where the most dangerous situations involve pulling over reckless drivers or saving kittens.
