I kind of do, actually, but I don't know what it is. For some reason, I do kind of feel like I should do something big, and the idea of an "everyday" working job isn't nearly as appealing as doing something big with true mastery, something that really moves people. In essence, as you said, like I have a calling or potential out of the ordinary to make people think differently and feel differently.
But... I don't know if it would be something I'd want to do my whole life, whatever it is. Living a "normal" life would be fine, but I'd want to have the sense of accomplishment from the big thing behind it first. There's still no reason an everyday job can't give people a sense of accomplishment and contribution to the community.
I'd say these dreams of mine (if you can call them that, they are too vague to be much of anything) are generally frowned upon. Maybe I'm naiive, or maybe most people lack the balls to try to do something grand, and maybe most people refuse to beleive that the people they know could go on to do something "larger" than the everyday thing. Maybe all of those are true, maybe none of them are. But in my experience I know two people who are on track to become pretty big. One is set to be the Canadian Olympic pair figure-skater (and at this point she would probably have to try to fail), and one is fairly well on their way to becoming a professional hockey player. One of them I only vaguely know (she is the daughter of my parent's friends, so I've met her a couple of times though I hardly remember), and the other has lived next to me for my entire life. If they can it, theres no reason I can't (other than the fact I have no idea what it is I want to do!). Still, its kind of frowned upon to have big dreams.
Perhaps it makes sense that older people don't beleive that people can actually do these things, and maybe it makes sense that they just kind of roll it off like its nothing if you say you want to do something big. As other people have said, most young people have big dreams. But as I said earlier, I don't think people in general (meaning of any age) have the nuts to actually try to make these dreams happen. In light of that, it makes sense they would look at the dreams of young people and say "no, it won't work" because it never worked for them and the people they know. Still, the people who say that dreams are impossible (in my case, teachers, parents, and sometimes other kids) seem impatient and unimaginative. Blah, its a mess...