Yeah, yeah, girly choice, whatevs. As a kid, my main draw to this was Ursula - a cunning, bewitching foil for the titular flipper-footed heroine. She's large, in charge, and has a seriously wicked sense of humour.
Also, she gets the best song of the lot ('Poor Unfortunate Souls', replete with in-camera booby jiggle, massive kudos).
But aside from boasting the best Disney villainess this side of Cruella, The Little Mermaid is also notable for its stellar animation (check out those twinkly jewels scattered across the ocean surface), and completely adorable, not-annoying sidekicks in the form of Skuttle and Flounder.
Even now, it's the perfect hangover cure.