I would say Storytelling Alice, but the scheduled release date for 3.0 is summer of next year. I've used Alice 2.0 and am satisfied with the experience, but the model library lacks if you're doing anything more than a nice neighborhood scene...

I'd go with something that has a large quality graphics/model library. Its good learning how to code, but its even better to feel proud of what you've created, and having an application, movie, or game that looks nice and polished is crucial for that feeling of accomplishment.