I'd like an ML who's cold-hearted, rich and a spoiled brat (kinda like Gu Jun-Pyo, Domyouji Tsukasa, Dao Ming and Mu Rong Yun Hai. But as he falls for the FL (poor, strong, genuine and caring), he changes for the better. I've seen all the boys over flowers version in this trope. Princess hours, Shining Inheritance as well as "Noble, my love".