Why should I convert? And to what? (God..)?

I'm just so curious why do certain people believe in "God". I'm a Atheist, and kind of plan to stay this way cause I honestly don't see a reason to convert. I've looked up Jewdiasim, Catholicism, and Christianity, and none of them make any scence really to me. Can someone like briefly give me the idea of each, and why would I want to be a part of it. I mean no offense to anyone, I'm just curious as to all of this.