@EnSeouled Nirvana in Fire, The Disguiser, Sound of the Desert, Wu Xin: The Monster Killer. Nirvana in Fire is probably the best out of these from acting to production values.
One thing I always consider with acting in eastern shows is that acting in general originates from theater and western theater have very different feel than the eastern. You can see the same "over the topness" you see in cdrama in Chinese theater, so while bad acting exists there is also a cultural thing in the mix. Another thing is the intonation, every language has its own and Chinese intonation (the way the pitch of the voice fluctuate) is rather complex and very different from that of western languages, so again while bad acting exists there is also a linguistic thing in the mix.
The thing that drives me nuts in jdramas is not so much the acting as the bad camerawork, not everything needs to be as pretty and tightly shot as in Rurouni Kenshin, but still I would like sometimes to forget that I'm watching actors on a set.