Personally, I find it impossible to choose to believe something, all things equal, just because I like the implications. The doubt will always be in the back of my mind, "But what if it's not really true?"

I hold to compatabilism. As far as I can tell, the universe unfolds according to natural laws, and we're no exceptions. But we have agency over our own lives, the decisions we will make matter, and we're free in every way that's meaningful.