"Truth has no path. Truth is living, and therefore, changing. It has no resting place, no form, no organized institution, no philosophy. When you see that, you will understand that this living thing is also what you are. You cannot express and be alive through static, put-together form, through sylized movement."
I find this to be true, atleast for me. Paradoxially, I choose to have no philosophy, or rather my philosophy is no philosophy. "Give up thinking as though not giving it up."
I therefore find that defining my existence is futile. I find that if I remain unbound by rules of a certain religion or set of rules, I can express myself fully, which is through other people, "True living is living for others." This answers your third question.
(Why yes, I do enjoy using quotes. Why repeat what has already been said, only in different words?)
I dont live for painting, thinking, sculpting, gaming, being a roadie, playing instruments, teaching instruments or learning to play new instruments. These are necessary for me, as they are a way for me to express myself, and I truly enjoy them. What I live for is the interaction with other human beings, which I believe brings the most joy in life, and what is I am supposed to be doing.
Therefore painting and playing music, for an example, is only truly meaningful when I can share it. It should'nt come as a big surprise that my favorite instrument is the bass.

Still, writing, for an example, is a very personal experience and mainly helps me to relax or put down thoughts in words. Writing in itself is very personal and largely affects only me, but it turns into something completely different when someone reads it, or I manage to say things that Ive written that I can remember.
I am very happy with this "philosophy of having no philosophy". Although I do have certain rules and guidelines that I follow, these are shared by everyone, atleast to some extent. Be happy, make others happy, do onto others only what you would have them do onto you, etc. But by having no philosophy, I can observe everything objectively, without already standing on one side of an argument, and it gives me the ability to decide everything that affects me. It allows me to not have to separate good from evil, but rather adapt myself, "to ride [good and evil] as a cork adapts itself to the crests and troughs of the waves."
What it also allows me to do is to enjoy and learn philosophy of all kinds, which is something I love. I always quote Bertrand Russell when talking about things like these, "I would never die for my beliefs, because I might be wrong." Philosophy is truly something great.
Worst part about philosophy, though: I'd like to go on studying philosophy at a higher level, but I'd also like to get a job at some point. Ah, choices choices.