I consider myself an agnostic atheist, and I don't have any belief in an afterlife. I don't necessarily deny the existence of one; it would certainly be nice for something to be after this. But I don't hinge my life on one existing either. I prefer to live as if an afterlife doesn't exist, which gives this life infinitely more meaning (not out of a bias against religion, but simply by virtue of this life being finite). If there's an afterlife, it comes as a welcome bonus.