They may not be as carefree as they look. In a Kaiser Family Foundation/MTV poll of 18-24-year-olds, respondents were asked to name "the biggest single problem or concern that you have in your own life today." A plurality (22 percent) cited "jobs/money/financial pressure," while another6 percent pointed to "the economy/taxes." Twenty percent picked either education in general or the cost of getting one. (More than half those polled are students.) No other issue pulled more than 4 percent of the vote, which indicates the futility of facile generalization about the concerns of young adults. Among other tidbits from the survey: Despite the seeming paganism of their cohort's taste in pop culture, 50 percent said religion is "very important" in their lives, and another 30 percent said it's "somewhat important."