I think the problem might be Natalie. She's Australian and they're generally very competitive. She doesn't get the whole "British love a plucky loser" or we love the "ever so 'umble" contestant, so we really don't appreciate her constant whining and pushing of Ricky.
We want them to look like they're having fun and that they're grateful for the support or marks they get, not constantly whinging that it should have been more. She's a fantastic dancer, but her personality leaves me cold.
They're also taking it a tad too seriously, alright way too seriously and we can't see the fun in their relationship. I think that's true of most of them though, only Ian and Jade seem like they're actually having a ball, rather than being tortured with hot metal cattle prods!

It's a bl**dy dance show people!