Comparing all 4 finalists for each dance style whose is your favourite? My picks would be...

Waltz - Simon & Kristina
Tango - Frankie & Kevin
Quickstep - Simon & Kristina
Foxtrot - Simon & Kristina
Paso - Frankie & Kevin
Rumba - Caroline & Pasha
Samba - Mark & Karen
Jive - Mark & Karen
Salsa - Simon & Kristina
Charleston - Caroline & Pasha