I'm not really sure why, but gambling simply doesn't appeal to me. In any way. It's not even that I don't like games associated with gambling. I enjoy poker, blackjack, etc... when not associated with gambling. When you throw the monetary win/loss aspect at it I simply have zero interest. I border on being against it, but being (note small l) libertarian, I'm pretty much against gambling myself but have no problem with other people gambling.
I've had long, fun nights playing poker with friends, but I always decline to play when money is involved. I'm not even sure why, I just don't want to do it.