I dont believe in Reincarnation, Nor an afterlife.
And I feel this makes me appreciate THIS life even more, how boring it must be to know that after all we go through here on earth, we'd have to suffer it all over again. and knowing there is always life eternal, wouldnt that make you a little lazy, and too arrogant to enjoy this life properly.
If i get through THIS life and there turns out to be something hereafter, I wouldnt have wasted my life, just enjoyed it. If id have got to the end of my life believing in more and it turned out not to be true... Id be a little P'd off, wouldnt you?