IMHO.
Hits:
-Wonder Pets...they are cute and helpful
-Dora/Diego...interchangable in my mind. DS like Dora, but I couldn't buy him sparkly pink shoes, could I? Then Diego came out, and all was well in his world!
-Thomas...dead favourite in our house. But I think they should not just show new episodes, but some old ones as well.
-My friend Rabbit... a new favourite here, really cute, sweet show
-Backyardigans... I like the different kinds of music, and I enjoy the animation
-Berenstain Bears...I wish I lived in their world. I wish I was Mama Bear. I wish there were more episodes
-Mighty Machines...this is a great show for learning about things in the real world. They need some other similar shows, maybe a short cooking show or something with real people showing actual skills needed for life.
On the fence:
Yo Gabba Gabba: weirded me out at first, but I can't really disagree with anything they are teaching, and in fact they are good lessons. The show is bizarre, but it is growing on me.