I loved this series. I personally think each actor played their roles really well. Each Khun Chai was unique and flaws.
Khun Chai Taratorn -Very mature, calm and level headed, he'll catch you if you fall. I love that he's very considerate and cautious before he speaks, but he was very slow with his feelings and was going to marry a girl that he didn't love.
Khun Chai Pawornruj -Very sweet and down to earth. My ideal husband, but he sees himself so low.
Khun Chai Puttipat -Handsome smile, very reasonable and loving especially to his wifey Krongkaew. I love his honesty and straightforwardness but sometimes too blunt.
Khun Chai Rachanon -Very fun loving, although stiff, he's always so silly. Life with him will never be dull. He sucks for running away from Soifah.
Khun Chai Ronnapee -Very helpful, strong and dedicated, he was always the first one to help his siblings. He's too stubborn and insulted his n'ek before knowing anything. Grrr....but he is so loving, strong and brave. I'd feel safe in his arms forever.
Khun Chai Ronnapee and Khun Chai Pawornruj stood out the most to me when it comes to the Khun Chais. As for the supporting actors, Teacher Chinnakorn, Khun Chatchawee/Jao Luang Rangsiman and Khun Aut stood out the most.