Hm.. I'm kimmy bias so obviously Kim-Nadech, their facial structure makes them look more compatible in my opinion. I met Yaya and Nadech first and I liked them first but other than DJA I don't like their other lakorns.
I have to agree with Bella on this . Nadech and Kim were good to watch cus their acting were compatible but I felt no chemistry between them. On the other hand, Nadech and Yaya have this natural melting the screen chemistry that never fails to get to me.