My all time favorite film is Lady and the Tramp. Human film, though...I can't believe I'm saying this, but out of the many very worthy films I've watched and loved, I think Pirates of the Caribbean Curse of the Black Pearl is up there. You have to suspend disbelief in the supernatural, and there are many historical inaccuracies, but here is what it does well:
Tight storytelling that is perfectly paced, a memorable score well-matched to the content, it's believable in the context of pirate superstitions and pirate lore, memorable characters, lots of humor, nice visuals, an interesting romance, a satisfying conclusion.
I hate the other films in this franchise, but the first was based on an old story from the 50s, and I think it shows in the writing. It was one of those times when everything came together for something really good, and it's a nice movie for repeat viewings.