I'm a little bit cautious when reading the parts in bold. I see you guys saying all of this negative stuff about your experience but then you say it's worth it....I don't really get what pros could outweigh such sh*tty cons.
I think I would really medicine and studying/learning is fulfilling, but I would much rather have my weekends and holidays than studying something that I find interesting. I'm coming to the end of my undergrad and I just can't decide between perusing medicine or dentistry. Medicine seems interesting but hard and dentistry seems easier but dull. I'm not sure that I want to voluntarily put myself through that kind of hell for so long. Any advice?
I think it has a lot to do with cognitive dissonance.
There is no point in putting yourself through a harrowing experience without some reward, so, psychologically, you will make it rewarding.
The exceptions are probably the people at both extremes-- those who love medicine and those who absolutely despise it. Either there's very little dissonance or it's so great that it's insurmountable. People in the latter category probably end up quitting.
Personally, that's why I think all the griping people do is usually pretty telling. Probably means there's some definite dysfunction going on. (Otherwise, we'd be leaning toward the other extreme, which in sports terms is called "homerism".) Not saying "medicine" is terrible, but the system's definitely flawed. I'll hash what others have said though, and say that I don't really know of any profession where # of positive comments > # of negative. In this sense, medicine's probably not inherently a better profession than anything else, but it's not worse either.
The difference will probably be in how much weight each of your values hold-- i.e., do you value your weekends/holidays enough over academic interest/prestige/etc. so you'll end up regretting choosing dentistry over medicine? Or vice versa?
Either way, I'd bet chances are you'll fall into that middle category that ends up clearing your dissonance about your choice, and you'll be fine. Life goes on. It's still worth thinking about though, in case you fall into that group that ends up really regretting doing one over the other.
Also, there are some psychological studies that suggest that people have a baseline level of happiness, and this isn't very dependent on circumstances. From what I remember, an example might be if someone was like, "I would be so much happier if I got that promotion at work," or "if I started dating that person, I'd be so much happier." Based on self-reports, it turns out that those things really don't have much bearing on overall feelings of "happiness" over time.
And by that, I mean to say this: If you're a happy person, you'll probably be happy whether you go into medicine or dentistry. If you're not, then neither will make you happy.
At the end of the day, I feel like it's important not to take yourself too seriously. Or your profession too seriously. Life's pretty short, and it'd be sad to spend most of it feeling dissatisfied with what you have or don't have. In terms of medicine vs. dentistry, try figuring out your values, then make as much of an informed decision (shadow?) as you can. Beyond that, there's a lot that's out of your control anyway. And what more can you do?
Dunno if any of that helps, but feels nice to get those thoughts off my chest. Now back to shelf studying...
/soapbox
Edit: Just to clarify with another thought I just had too-- Medicine probably doesn't have a disproportionate unhappy-to-happy people ratio, so that's why I think the number of gripes is pretty telling. Although sometimes I do feel like there really are a lot of people in med school who are really vocal about their displeasure with everything, which kind of makes the experience suck more than it needs to. I'm probably a baseline-positive person, but I really feed off others. Happy people make me happy. Angry people make me angry. This has not brought me great comfort in med school.