Hmm... I mean that's part of the issue - I like all sorts of aesthestics really! I do enjoy dark skin quite a lot, darker complexions tend to read very pretty to me! I also tend to enjoy curvier silhouettes as well.
But ultimately I enjoy observing and thinking about what makes a character unique I suppose? The Zelda franchise is a fine example of this, where Midna may be one of my favorite characters of all time, but you got Ruto who's this fish lady who's 'technically' naked but has this dress outline, her blue/color color scheme is quite pretty! I might not be attracted to OoT's Impa but I do appreciate in the remake she has this imposing ninja bodyguard vibe going on. Very good! In fact, my favorite Impa has been her incarnation in Hyrule Warriors, S+ look ngl.

But uhm, to answer your second question Ming-Ming does draw from what I'd like to see in character design! I had wondered once or twice to myself, if I were surrounded by girls who looked like her, would I make Ming-Ming at all?
Perhaps this is a question to ask a me in a different universe, who knows.