My favourites are Matt & Aliona's and Chelsee & Pasha's, for all round dance content brilliance and sheer joy
Also thought Natalie & Artem's was great, and DVO & James' was also impressive, but didn't like the music for either which spoiled my enjoyment of them a bit.
Can definitely see why Sophie & Brendan's, Louis & Flavia's and Chris & Ola's are still so popular too! Fun/stylish, and they all looked like they enjoyed dancing them a lot which is great to watch.
PS DiamondBetty, fab link, thanks. Odd that I really like this, some other electro swing stuff, and the Holly/Artem one, but just wasn't very keen on Nat/Artem track. Wonder why that is. Just been watching some other dances of theirs on YouTube - Ksenia's solo stuff is a-ma-zing