I suppose I'm an agnostic atheist as well.
I feel like religion or religious beliefs only limit person in various ways and prevent people from living their life the way they truly want to live it. I can see why someone would enjoy following certain religions, but personally it just doesn't fulfil me in any way so I do not practice it.
I personally believe that our life came about through evolution and there's no magic to it, but even if there is a god I don't think it would be something comprehensible to human mind, and as such not worth trying to understand it.
It definitely affects my life in a positive way, or at least I think it does. Too many people spend their lives attempting to please god/gods of their religion and believe that sticking to certain rules is a way to fulfilling life. I feel like lack of religious beliefs leaves me with more time for loved ones and provides me with higher sense of control in my own life, which gives me peace of mind.