I'm Catholic, and I gave up sugar/sweets for Lent. Not just because I want to sacrifice something meaningful for the Lord, but because I feel better and my moods are less labile when I don't eat sweets. Besides, I gained some weight back thanks to needing Zyprexa several times in the past few months, and this will give me a jump-start on losing it again. So yes, it's sort of selfish too, but it IS hard, and right now I'm really cranky and out of sorts because I'm going through doughnut withdrawal!