I think Kim Heechul is best for Sandara Park. They're both greatly cherished by their respective companies and are considered to be the prettiest male and female idol of all. As Heechul is the SM Prince, Dara is the YG Princess. Aside from looks, they both have the same wits, charm, and personality. They're 4-Dimensional in words and deeds. They are playful in a good way, but can be sensitive. They're protective to the people who means a great deal to them. They're not afraid to boldly speak up their minds. They're both uniquely funny! Fans noticed that whenever Heechul is with Sandara, his usual "hyper and savage" self vanishes and instead turns into this meek, warm, and sincere man. It's so obvious that he really likes her, as can be seen on several broadcasts. (SBS Gayo Daejun 2009 and 2013, Secretly Greatly, Lipstick Prince, etc.) Many would even say that they counterbalance each other (and I agree to that), that's why lots of fans ship them. Remember when Heechul stated, "I want to sincerely date a woman who's prettier than me" and "My woman must be elegant, nice, pretty, someone who can softly guide me, someone who will compensate my personality of being playful, funny, and sensitive". On the other hand, Sandara stated, "I prefer the slim type against muscular men, I want a man who can hold me in his arms (she likes flower boys). Age is not really a matter, as long as he looks at me like a woman, I will also look at him like a man." #HeeDara