Living and flying domestically in the Philippines for coming up on 10 years now, I would say all the airlines are equally terrible. They will all have consistent 1-3 hour delays, leave your baggage behind because they overbooked the flight, sit at the runway for 30+ minutes after landing because the gate isn't available, etc.
Pick whichever one has the most attractive times and prices for your trips. They will weigh your bags and are generally strict. I often have my ~30lb carry on with my camera gear which is way over the carry-on weight limit. If I can tell the girl at the check in desk it has expensive camera gear, they have to-date always let me carry it on.
For international flights I would avoid any PH carrier if at all possible. You may be okay if it's a direct flight like Manila->LA, but for any itinerary with layovers and flights operated by any other airlines, I have had some horrible experiences. If anything goes wrong and your PAL flight is delayed (which is probably 40-60% of the time), they will not help you at all, or you will wait hours to talk to one of their customer service reps in a line of 50 other people. By the time it's your turn it will be too late to get you on any other flight and they will end up booking you on a new itinerary days later, and won't pay for accomodations... Ask me how I know lol.