1. This question honestly doesn't make a whole lot of sense to me. Philosophy is how I see the world, so unless it's a constantly shifting and schizophrenic viewpoint I'm pretty sure how I see the world can't change how I see the world. On that note, I've got a bit of a blend of things. It can best be summed up by saying that I'm chaotic good: The world is a beautiful place, it's in a bit of a bad spot right now, most people are idiots, but on a whole things could always be much worse so do what you can to help who you can and don't worry about too much otherwise. If a rule or boundary is too arbitrary and asinine to seem logical, then it's not really a rule. Roads, paths, and premade choices are reliable, but sometimes it's best to carve your own way. Take care of what you have, don't covet what you don't, material possessions have no value in the face of experience (the road to happiness is not paved with trinkets), it's better to die penniless with a wealth of memories than atop a mountain of gold and terminally bored.
Most important of all: Life is short. Have fun with it, find love and friends where you can, find the capacity to forgive, and do whatever it is you want to do, to hell with anyone that tells you otherwise.
2. Well, of course. Everything has a downside. Some people can't handle that much freedom, for one. For two, this innately leads against material gain, so if you're the 'fast cars and hot trophy wives' kind of person, I don't think you'll find much success here. And for three, you generally need a bit of a Peter Pan complex to truly enjoy it.
3. Some Zen Buddhism here, some Taoism there, some good old Irish nature, and to top it off, about two decades of personal experience.