CGI films are usually pretty childish affairs, lots of noise and colour thrown over a simple story, with some jokes for the adults funding the cinematic expedition. By contrast, Rango is actually a fairly sophisticated movie, a Western pastiche with anthropomorphic animals mixed with postmodern references and existential themes.
Johnny Depp plays the titular character, a chameleon thespian who adopts a heroic identity when lost in the desert. He talks to mystic roadkill, has strange visions of Clint Eastwood, and undergoes an existential crisis. It’s a pretty strange movie, with a lot of ideas – I really liked Beans, the desert iguana who freezes in the middle of sentences.
I think I would have appreciated more layers had I been knowledgeable about the genre (and not so sleepy).