In terms of acting the actors did their part and made some awesome chemistry. What was lacking was the storyline. It started of great and gradually progresses w/ no definite conclusion except for 2 of the relationships. It kept me wondering if they really intended for the storyline to be as such. It left me confused and unmistakably somewhat irritated.
I think they bit more than they could chew. They focused to much on too many coupling that in the end not everyone of them was given the time to actually finish and come up w/ a closure that will surely be engaging enough to follow through in another season. I know there are such thing as cliff-hangers but there is also something called story progression closure or simply an arc closure. If they decide to start a new chapter without even closing the last one, it will just leave a bad taste in the mouth.
A good example is in "Together with me". The BrightFarm coupling had an arc closure that then started a new chapter of development and emotional maturity for both of them the next season. Season 2 showed a closure that went a different direction in season 3 which made for an awesome watching.

Thoughts on Coupling: As I said they had great chemistry and great acting skills and what was lacking was the story progression which had no closure for most of the coupling.

LukmoSimai: Though the season did end with an arc closure for this coupling, which btw I considered to be the main, it left me dissatisfied and somewhat annoyed of how it ended. The truth never came out and I felt sorry for them because in the end they were deprived of truly being together. I felt bad for Simai for being forced to suppress his emotion due to a facade of lies making him think that they can't be together because they are "Brothers", which is F**ked up.

EakPhob: Uhhhhhgggg! What should I say? I though their relationship would actually have a progress but I guess they didn't have time to do so. They just somewhat gave it a closure w/out giving it an actual conclusion. Did he give up or something???? Its making me dizzy just by thinking about it.

CopyNampu: Now this coupling I actually like because their relationship had an actual conclusion and not just that it happened 3-4 episodes before the series have ended which should have given the production at least 2 episode to give a conclusion to the rest of the relationship. I love that Copy actually had the guts to tell his father early on. LOVE THAT!

BothNewYear: Concluded w/ a bang! Not much of a relationship development but more on dealing w/ jealousy in like 1 episode....

SueaPlawaan: This is a fuqin bromance.... That is it! The relationship was actually doing great until I realized that it was not gonna have a conclusion. The relationship was left mid-air keeping me wondering if its really a coupling or just bromance. I'm confused! When I realized that, I just said "F*ck this sh*t I'm out".