It has been a rough year for the job market, though the recession has weeded out some shining exceptions to the bad news. In a landslide vote, you chose health care as the industry with the most secure jobs in 2008 [1]. I agree it's a secure field relative to most others, and it seems that health care workers are always in demand.
As for the career you voted as most overrated [2], real estate agent beat advertising executive in a marginal win for the career that delivers the least in terms of expectations meeting reality. It's definitely a subjective matter, but it seems those of you who have tried these careers or know people who did, haven't exactly gotten the best impressions.
Source [3]