Eh, I guess we all have different ideas about what makes for a fun or interesting life. I don’t do any of those “vices” but it’s not because of being a super-uptight, religious person. I just don’t find those kinds of activities appealing or fun like some other people do.
-I don’t consider gambling immoral, but it does seem like throwing money away to me. Since I hate wasting money, I would rather just keep the money in my pocket and put it towards something more concrete than a slim chance of winning.
-I’ve never done any illegal drugs, partially because I don’t want to do anything stupid under the influence, partially because it would ruin my career if I were to get busted for drugs, and partially because enough weird crap happens in my life as it is, that I don’t need to spice things up with drug-induced hallucinations. 
-I don’t drink alchohol simply because most booze tastes unpleasant to me, I don’t want to end up doing something stupid while under the influence (again), and I know I’d hate the feeling of being hungover or puking.
-I am a soon-to-be 24 year old virgin, in every sense of the word. One reason for that is probably that I used to be fat, and hence didn’t date much while I was a teen. I can’t say that I feel I missed out on much, since I get the impression most teenaged boys are not particularly skilled or generous as sex partners.
Nowadays, I am attractive enough to get laid, and do in fact have a strong sex drive, but for some silly reason I do want to make sure that the first guy I sleep with is a special person, and just haven’t had the right relationship yet where I felt that it was the right time to give it up…and at the same time, my standards for men have become higher now that I am a confident, semi-attractive adult than they were when I was a naive teen with low self esteem. Hey, even if most people do have premarital sex (which I can agree with although I am skeptical of the number being as high as the survey quoted earlier claims), not everyone wants to sleep with just any random person.
Working in the health field has helped convince me that casual sex isn’t the way I want to go more than any religious sentiment has. I have had a chance to treat guys that, had I met them on a blind date, I wouldn’t have guessed were harboring that raging case of genital warts that I saw them in the office for.
Pregnancy isn’t that scary to me, since I am at an place in life where I think I could handle being a mom, but I suppose it is a nice little extra bonus to know with 100% certainty that I am not pregnant and there’s nothing to stress out over if I’m a little late this month.
So, I guess for me, there’s not really any “point” to it. I don’t have any conviction that some Higher Being will reward me for avoiding doing this stuff. I just haven’t felt any particular need to engage in these vices yet. There are lots of other things in life that I find fun and rewarding, so I don’t feel deprived or like I’m missing out on anything.