Has all the narrative balance and nuance as the European neorealist fantasies that it tips its hat towards (Miracle in Milan comes directly to mind). And just like those, it is sweet and warm but there's a degree of harshness, a kind of melancholy bitterness that improves with (audience) age. A combination of diverse flavors lends it an intense complexity that rises above imitators. Of course this is a food metaphor.
It's hard to like rats... unless they're made by Pixar in outrageously beautiful animation. To paraphrase the movie's most famous line, not every story is great but great stories can come from everywhere, and that hasn't been more evident since Pixar's debut. They've been pushing the boundaries on animation and narrative alike creating the most inventive stories in cinema. "Ratatouille" is just one of them.
Gets better with every viewing. When it first came out I thought it was just charming; a decade and four viewings later I find myself entranced by its wondrous celebration of creativity and its real imaginative daring (on paper the premise really shouldn't work but it does!). Stylistically it's an absolute dream and the sentiment is really special: Anton Ego's big speech reduces me to tears every time. Wonderful.