I am going to start with an admission that I love all these that have been mentioned as being hated:
Timmy Time
Pingu
Abney & Teal
Mainly because DS frequently proper belly laughs at them, but then I also like a bit of accordion country music. I hate:
Postman Pat SDS - I have mused about alternative lyrics and can't scan them well but they include 'He will never get, sacked from his job... all the Union leaders love an incompetent...' I know it would be boring if he didn't get out the helicopter on a regular basis, but I just think of all the money getting shelled out. And it's often only needed because PP has lost his fucking delivery somehow.
Cloudbabies - I an a fan of atmospheric optics anyway, but the other day the sun got cold. I mean FFS.
Zingzillas - they just generally piss me off. I am often confused why Drum can't speak properly... it's not very clear if she's supposed to be a baby or toddler (who happens to have amazing coordination and rhythm skills).
Mike the Knight - just because
I don't mind Tree Fu Tom, as it's very funny when DS (3) spreads his legs wide apart, says something move related followed by (for example): 'Say "Make Mummy go downstairs" to send the magic to me!'