hmm how to say, you are missing out on a lot. I mainly read manga as well but the quality of Korean and Chinese titles has risen quite a lot.
Maybe, but each time I've given manhua/manhwa a chance, the unlikable and psychopathic (as in, with no empathy or remorse whatsoever) protagonist of the story ruined it for me. Maybe that's because I have come in contact only with the bottom of the barrel by (lack of) chance, but trust me, I've burned myself far too many times with those to even consider trying it again. That, and the fact that each time I hear about those stories, the protagonist seems incredibly egoistical, self-serving and a liar (which I despise from the bottom of my soul).
All in all, I'll keep to the Japanese 'Mr. Niceguy', even if they are considered 'beta males'. They irritate me far less.