Do not go to the south! Mindanao is the main southern island, home to the rebels and Islamic fundamentalists. They don't much care for westerners down there. The main northern island is Luzon, where Manila is. Cebu, Boracay and Palawan are also great tourist destinations. Clean, friendly and safe. The only westerners I've seen (or heard of) getting in trouble in Manila were either dealing in drugs or getting drunk and obnoxious. It's not a good idea to offend the easy going filipinos. Of course, that could probably be said for almost anywhere in the world.
i get the feeling i'd blend in pretty good over there. but these days i'm overly cautious for some reason.
still i've seen pictures and i'd love to go one day.