Anything... If it's late at night and Inspector Gadget comes on then I watch it, I fret not. Hell, I even watch the Gadget Boy and Gadget Boy around the world things which didn't exist when I was a kid.
This year I bought Oliver and Company on DVD (it was cheap) because I wanted to watch it again (saw at the cinema when I was a kid, it disappeared for some reason). Then I gave it to my niece, bonus.
Cartoons are good for the soul, they demand naff-all from you yet can easily entertain through the comedy or adventure.
Even some modern kiddy-ones are good (yes, poccoyo is funny, though in my case because the long pauses allow for your own.. voice overs. Hur hur hur). I like those gross cartoons.. orrible something or others, where they've named each of the kids. Like the constipated girl who's huge because she doesn't... poo. Kids entertainment? Hur hur hur!