I'm not very experienced with c-dramas but I've been watching them for a while now and I like most of what I've watched so far. (Not Boss & Me, dropped it... but we all have our taste...) It seems like Chinese historical dramas often have very beautiful costumes, I like that.
My favourites:
Nirvana in Fire (for me it's the best drama ever from any country, it's all kinds of amazing)
Ode to Joy (wonderful, lovely drama about friendship, life, love...)
Battle of Changsha (equal parts heartwarming and heartbreaking, family, war and romance)
Sound of the Desert (wonderful romance drama)
Also good:
The Disguiser (war, spies, family, romance)
Scarlet Heart (historical, romance)
Go! Goal! Fighting! (modern, school, life, a touch of romcom)