I think they all seem nice enough and I don't have a favourite out of any of the girls. The performances I enjoy most are the ones in which the couple actually dance together on the ice, rather than perform a series of tricks and feats of strength to which the music is - at best - incidental.
That's why I like Ray most and really enjoyed Sam's performance this week. Hayley is great at communicating enthusiasm and her best performance - Jai Ho - was great fun, but there's often a bit too much toe-pick dancing going on, which isn't the same as skating. And Beth is, as you'd expect, brilliantly agile but again, not so much of a dancer.
It's not a great surprise that Ray outdances them - he had dance training as a child and won dance contests while at school - but it is a dancing on ice competition and that impresses me a lot more that weightlifting on ice (which is what some of the lifts amount to), acrobatics on ice and insane daredevil stunts on ice (by which I mean that horrible 'headbanger' thing, obviously).