Beauty, sexiness...(all other descriptions) is in the eye of the beholder.
My dad thought Brigitte Bardot was sexy, but I tend to find more understated girls sexy like Natalie Portman, who most female-loving guys I know find as the total opposite of and instead rather plain or just pretty but with no obvious sexuality oozing from. I tend to find the obvious sexiness (if that is even a thing) which is more constructed sexiness like exentuated makeup application, certain ways of dressing, certain pouts and body stances etc, less sexy, and the girls that that can wear an oversized jumper with a pair of jeans with little to no makeup are the real understated sex kittens of them all. If you need to become sexy, you aren't, for me. If you sexy (or whatever form of attractiveness) without trying at your bare minimum, then you are, but that's just my take. Girls I go for try little in that sense but still have more than enough.
So I find most of the Strictly girls too sexy and therefore not actually sexy (as contradictory as that sounds). Don't get me wrong, girls in well fitted dress/skirt/even tight trousers with moderate makeup can be stunning, but the sexiness on Strictly is so heightened (unnaturally) that I find it a but much, and I'd prefer they don't pile it on the girls so much, as I prefer most of them more toned down down (which others then say reveals them as rough, which I don't view it as personally). Not being used to a girl wearing makeup doesn't make them rough (by default) to me, as you can be as rough or unappealing wearing makeup to.
As for Natalie, I have grown to love her big bug eyes and her slightly alternatively shaped head. She's not classicaly beautiful like say a Grace Kelly or Audrey Hepburn (prob because of face symmetry etc), but she is attractive in her own way as well as prob in a general sense. I don't find her sexy, but ironcailly I would say she is body-hot. I find her easy to look at in physique, even if she might be over-toned in some way due to be a dancer. I don't think any of the STrictly girls atm are stand out beautiful, though Ola (in the early days) and Katya Virshilas facially have always fitted my ideal aesthetic. I find Karen's facial features a bit strong, I prefer softer more gentle and petite features on females, though some females can suit stronger, bigger facial features just as some males can suit softer more gentle smaller features.
Generally I find the Pro girls easier on the eye than the male ones. For years, even with Artem in the lineup I tend to gravitate to the females more even if I don't find them sexy. I find the male Pros more attractive on Halloween shows when they're caked in makeup strangely.