I voted for manga too. I have some manhwa (Wild school and Adrenalin) and I've read some others too and I must say that in overall, they are as good as any manga ! The problem is the ending. In nearly every manhwa I have readed, the ending is nonexistant.
You will tell me that some manga are the same, but in those case, the story just stop there and it must have been "to continue". The hero didn't finish what they are doing. Well, I don't really know how to say this, but that's how I feel.
PS : I still read manhwa ! They are really good too >.<