There are so many to dislike it is hard to choose. Flo is tiresome. Victoria Secret - I don't know how they get away with showing, IMO, soft porn.
The one I dislike most is any commercial for Beneful dog food as that stuff is garbage and it really irritates me that they advertise it like it is the best thing you could ever give your dog.
I like the one with the baby substituting for a car. I'm not 'into' babies, but that baby is really cute. I think they aren't as good this year but Target used to have some really great ads. I like the pig ... he is really funny.
Oh, maybe my favorite is the insurance one with the burglers in the house and the Ninja-like girl sneaking behind them and replacing everything they steal. I think that is an inspired commercial.