Raw, pure, unscripted, undirected "chemistry"? I'll give it to Prin & Chalida / MTEAM any day, any year, any time.
It's not my style to base my judgement only on bias or subjective feelings so....
Back in 2010, M&M has always led the polls in raw, off-scream chemistry. (Need proof? Just ask) But this is 2012, so I guess some fans have forgotten these two M&M because of the lack of promotion, fan-service, publicity, exposure, etc.
But even in 2012, they're still almost always in sync. Maybe even more so. Plus, the "eye contact"<--deliberate "neutral language." -- has become even more common and natural now.
I can't find the gif for this right now, but the timing of the "eye contact" was soo perfecto.
Posture, facial expressions, gaze etc. Very in sync. Even on Instagram, they tend to be in sync. (That is, neither on or off screen chemistry, but cyber "chemistry." xD)
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