Originally Posted by postit:
“The point, surely, is to vote for the person you think is the best dancer. My vote goes to Natalie because she is the best.”
You are asked to vote for your favourite.
Sometimes, your favourite is the technically best.
Sometimes, it's the couple you're loyal to.
Sometimes, it's who the judges incite you to vote for. (e.g. this week Sophie is getting backlash votes).
Sometimes, it's the couple who make you laugh the most.
Sometimes, it's who's 'improved'.
etc. etc.
On the original topic:
People like Natalie get protected by the leaderboard most weeks anyway, so whilst I like Nat I don't ever vote for her. I vote for who I want to keep in who is actually in danger of leaving. It probably doesn't have an effect, but they're free votes so whatever.