I don't dislike her (inasmuch as I 'know' her - which isn't at all, considering I've only seen her on TV!) but I'm afraid that the accent really grates! Now, before I get shot down in flames, I know that's a really shallow thing to say, but if we're honest we all have an accent which grates on us (be it scouse, geordie, brummie or whatever). It just that for me (and unfortunately in this case) it happens to be the N.I, accent, which sounds so 'harsh' compared to the southern Irish one (but I don't much care for that either, to be honest). I suppose some of our accent prejudices come from where we come from ourselves - the 'flatter' or more neutral our own accent is (I'm from the Cotswolds originally, so naturally only had a bit of a Gloucester 'twang', and now I live in Jersey so it's more of a South African 'twang'!). The more 'neutral' our natural accent is, perhaps, the more the overtly regional accents impact on us when they are spoken. As I say, I know that's a really shallow reason for finding it hard to watch/listen to Christine, but I can't help it! From what I've read she seems to be really nice person.
It seems that she also comes across as 'cold' and 'aloof' to some viewers. Perhaps she is just unsure of herself - just because you are on TV as your job doesn't automatically mean you're not shy (for example). I'm naturally a person lacking in self-confidence when it comes to 'presenting' myself to others in public, and I have been accused of being 'cold' and 'aloof' because I'm so scared of being noticed by other people. But because I'm a teacher no one believes me when I try and explain! If I had a fiver for each time I'd heard "but you're a teacher - how can you have no confidence?" I'd never have to work again! So it may be that Christine is the same - because she's on the TV no one can believe she's unsure of herself (if that is what makes her seem 'aloof').
However, if Christine is seen as 'fitting in' a bit better surely that can only be a good thing?