I reject religion, on a few grounds.
Firstly, there's no evidence for anything it's ever said for which there might be evidence. That's a trite observation, one that any fourteen-year-old who's spent ten minutes on YouTube could tell you, but it's important: I'm a materialist, I don't believe in reality that isn't physical and at least theoretically measurable, so if there has been no objective evidence, then no dice with me. Secondly, I wouldn't even want it to be true. I do not want all morality to come from some cosmic force who owns me, who created me, who can control me even after I die. I don't want to live under the eye of some spiritual father; let me be me, for all my failings and errors. And thirdly, I don't think it's practically helpful. I think a great deal of evil is done in it's name, and I think it's disgraceful that in modern societies we still bring up children and force them to sing songs to a God in schools. That's horrible. State education should not ever instil a religion. Even disregarding the fact that the most popular religious texts are a net in which homophobia, misogyny, and stupidity collect, it's an act of unimaginable arrogance to take minds which are too young to form a full opinion of reality and instil in them a belief system for which there is no objective evidence. And as my general worldview is based on the principle that all hierarchies should be questioned, I think we may as well start with the intergalactic hierarchy of God.
Also, Songs of Praise is boring.