I do always vote on dance performance, and I admit to finding it irritating year-on-year when we are deprived of a higher quality dance because the public vote is in favour of the John/Kenny/Kate/Chris figures.
However, I would not say it is a serious dance competition. Indeed, it is light entertainment. The crucial thing though I think maybe gets lost in the debate is that these things are not mutually exclusive polar opposites. I get the feeling from many posts and opinions off the forums that people see it as a vote for either dance or entertainment, and that there is the associated dichtomy between the judges and the public's voice.
I would like to say however that, though a light entertainment show, it is (without wanting to sound blindingly patronising) based on dance. It is the dancing which should provide the entertainment. And, for me, I find it far more entertaining (and this has to be distinguished from amusing!) to watch really good dancers, and watch dancers who display an increasing and substantial improvement.
In my mind I ask myself, "Would I rather see a show filled with Aleshas/Jills/Marks and be blown away by their dancing, or a show filled wth Johns/Kates/Fionas and chuckle along to their relative ineptiude?" I can get light comedic entertainment of that nature elsewhere on TV, but no tthe effect that beautiful dancing can have.
So, yes, it is light entertainment, but which crucially has dancing at its heart. I cannot understand why people who enjoy dance would rather see someone stumble around over someone who actually can dance to a competent level.