Like Bobak, my first encounter with a Disney platformer was Castle of Illusion, which was fun and quite challenging on hard difficulty.
Encouraged by COI I also bought World of Illusion, and of course Quackshot, and I spent a lot of time with this cool game. It's so funny to shoot the plugs around and jump around on them, and the gfx, music and fx are great.
In terms of cartoons, Disney was never my favourite company, I still am a Warner Bros. fan (Road Runner, Elmer Fudd, of course Duffy Duck, etc.), and I just love the old Tom & Jerry toons from 1950-67. I can't help myself, WB and MGM cartoons are so funny, I still LMAO when I see them. Too bad most T&J games aren't really good...