For me I think Alex make a better couple with Preang because they both look young and the same age. Alex with Teaw even though they both look young but some time Taew can look older than Alex to be his older sister.
Oh now i know who Preang is, for a second there i forgot. Preang played Chomsri in Wanida, Rome's sister in Yok Lai Make, the worker girl in Rak Prakasit.
Obviously i would choose my Plerng and Namfon, still awaiting the day they'll pair up again.