Having had kids some distance apart, I've dipped in & out of TV at various times. Of course, as a kid, I think I had the golden age of children's TV: Pogle's Wood, Ivor The Engine, The Clangers, Dangermouse, Blue Peter, Play School etc.
Coming back to it, I was pleased that Sesame Street was daily fare that Our Kid loved. But there wasn't much else of any quality that I saw. A few years later, when TGL was small, there was Teletubbies, which was good, and Tweenies, which was awful. And loads and loads of crappy USian animation.
Simpsons was something I enjoyed.
Now, we have In The Night Garden, which seems to be good on diversity, but a bit baffling, Balamory, which grates a bit, that thing with Bernard Cribbins, and Justin Fletcher's whole range of programmes, which are amazing.
So there are good programmes from all ages.