I would say because a lot of Roger Rabbit is live action, but then I notice that Enchanted made number 10 on the Yahoo poll:
Translation: people will vote for whatever is still floating around in their short attention span of the last year or so, even if it doesn't make sense.
That ridiculous list is basically just a who's who of what what's been hot with the mainstream audience in the past 4 or 5 years, with Lion King, Nightmare and an anime thrown in there for good measure. And if that includes all four of the most recent Pixar films, then so be it. And of course there's nothing there older than the early 1990s, which is just pathetic.
Really, this whole thing is so lame that I'm surprised people are discussing it like it actually means anything. The entire thing is designed for tweens and soccer moms who probably have no idea who Tim Burton, Brad Bird, John Lasseter, or Hayao Miyazaki even are. This poll should have been re-named "Top Ten Brat Badysitter DVDs That Little Johnny Watches Over and Over."