TBH if you're flying Economy class, you should view your flight as a means to an end, getting from A to B to start a wonderful trip you're looking forward to. No matter which airline you pick, you're going to get fed, movies, drinks and a seat that's impossible to sleep in. It's all much of a muchness.
Only if you're flying Business / First class then the quality of service you get will vary wildly and selection of airline is key to get the best value for money.
If I was flying Economy class I would pick the most direct route / shortest journey time and most convenient that I could afford. If it turns out to be Philippine Airlines then so be it.
