I watched this cos it was short. Can't say I was expecting much from it, and was pleasantly surprised as a result. This was in more ways than one the feel of this is similar to "Onegai Teacher" (the female leads are even voiced by the same actress). However, I thought "Onegai teacher" was a horrible anime... so how did this succeed where Onegai Teacher didn't, especially given the title of this was enough to make me cringe?
Is it the animation? The animation for AMG ("Ah! My Goddess") is only so-so, not as good as Onegai Teacher. The colours are a bit stale and though I wouldn't go as far as to say it looks dated, it's obvious that it isn't a recent anime. Also, Belldandy didn't look as stunning all the characters makes her out to be. :P
The sound? I REALLY liked the music in this one... the end theme is just so catchy and charming. In hindsight, it probably did a lot to tame my attitude towards AMG. The only bit that was slightly off was the music being played during the climax in the last episode. It was a tad over dramatic, and would have been more suitable in a mecha battle or something. Other than that, I loved the music. Did I mention that I especially liked the end theme? Oh well, it's so good it deserves another mention :P Even though I thought the voice acting was a little on the weak side, the sound department certainly went a long way towards making this a decent anime.
The story... as you might expect from someone who thought the Onegai Teacher's story was ludicrous, I thought the story for AMG was ludicrous too, and it was definitely the weakest part of this anime. But for some reason AMG seemed a lot less so than Onegai teacher. It felt like it was flowed much better. Maybe it is because of the characters - I felt the characters in AMG were much better portrayed. Initially, I thought it was a little weird how Belldandy just took to the guy so easily, but as it went on, I actually found the relationship between the two main characters to be a lot more natural than in "Onegai Teacher". And what's more, I actually cared a bit about what happened to the main character in this. So this is another one of the major factors that lifts this far above "Onegai Teacher".
AMG is far from being great, but I would describe it as a NICE anime, one of those that make you go "awww". It turned out to be pretty decent, and considering how I tend to hate anime from this genre, this is pretty high praise.