I myself do prefer J-20's looks. Its unconventional aerofoil (aka wing/canard/tail) placement are and probably will remain unique among 5th generation fighters for many years to come. And I also like J-20s somewhat long appearance, which some people have stated they dislike -- to me it gives off the impression that J-20 has the endurance to leave, do its mission, come home, all without needing crutches of air refuelling.
Good points, especially the endurance one. Among the 5th generation fighters, the J-20 is the biggest. I would assume that it can carry the largest amount of fuel too.