In looking through the list of top fifteen world skylines according to one person, I have to say I really liked Toronto and Sydney the best. Now keep in mind that other than Dallas and New York, I don’t think I have been to any of these places, so I am totally using the pictures provided there. What I liked about those two cities is that they showed a symetry with the largest buildings grouped in one space, and then a phased out (or down) step to the non-highrise district.
Sau Paulo and New York looked simply — well — a mess. There is no organization. It appears you can put up a building anywhere and just create a jumble.