I prefer Aladdin,Lion King ect over Cars,Nemo,Incredibles but maybe it's a childhood thing and I like what I grew up with more and the newer Disney CGI animated movies do have a huge following with kiRAB too as does their non animation (P.O.T.C inpaticular).
Maybe the likes Nemo,Incredibles have more complex plots as opposed to the likes of Lion King,Bambi,Peter Pan and so on and the emotion works best when it comes to the simpler settings.
Or maybe we just can't get used to CGI Disney (Although I see Toy Story as one of Disney's best).