That's a hard question to answer. I believe all religions have some truth and wisdom. I have no problem taking a quote or verse from any religion and applying to my life if there is something that I can learn from it. Obviously, I don't identify as all religions, but as Unitarian Universalist, which has this same philosophy of learning from and honoring all wisdom no matter where it comes from.
I do reject the way some practice certain religions, but I don't reject the religion itself because I think I can learn something from every religion, and I don't have to be a follower to benefit from its knowledge.
So, I'm going to flip the question and say that besides UUism, the religion I identify with most is Buddhism and all the rest are distant second.