I was raised catholic, and didn't find it particularly interesting. Then I read the bible, and while I thought it was a good book with lots of great tips, it didn't resonate strongly. Then I read the creation belief for a particular mythos:
There is that which is everything (source/god) and that which is nothing (non existance). Everything does, has, will or could exist forms up source. The opposite of source, is nothing or non existance, as nothing can exist outside of source. The two of these are not seperate, as they form the universe we live in. On the boundary between everything that exists and everything that doesn't exist, is the pattern of what actually does exist, as defined by a universe. Ours is one such universe, and it could be the only one possible, or it could be one of a near infinite number, there's no way us humans as humans could tell. This unique pattern of existance is what gives us the universe.
Why are we here? Because we are all a part of source, and the only way source can change, expand and grow is by taking nonexistance to create form and time imbued with consciousness in order to experience itself. I'm not even sure there is another purpose, because everything comes down to experience eventually.
Inside of this belief though, almost anything is possible. Any of the other religions could be true. In fact, they could all be true at the same time, because there's nothing saying that this universe is completely objective. If it is source, creating form in order to experience, then any experience could happen.
How did I come about this belief? I read it in a book one day and it just rang true for me. As I've read about other things that have resonated with me, I've adopted them into the belief, because they fit and because it resonates true.
Why don't I like organised religion? Because they take the magnificent wonder that is the universe and squeeze it down so it fits in a book, then they take this squeezed down book and claim it's the one truth. Then they create customs, traditions and behaviours for it's members. Finally, they set up institutions and structures to keep it all in place. All this is for control of the populace in order to gain money, to gain power, or to gain something else that's not their right either. It limits human freedom, which also limits human experience, and if I believe experience is what it's all about, then I won't like religion.
The closest match I could find to my belief is: Panentheism. Read about it
here.