For me:
3. SM Megamall/Glorietta - not the best in terms of atmosphere/layout, and TOO MANY people, but great for shopping. Well developed already and got almost anything you want in a mall(that can be found in the Philippines anyway).
2. Mall of Asia - once more stores will be open, it will be a shopping haven. Great view at the back, and it already got potential.
1. Rockwell - THE BEST. great atmosphere. Best bookstore(Fully Booked) around. Nice aura. Tends to be updated in stuffs but some are pricey than normal.