The Economist ran a poll asking people (divided by age and political affiliation) what decade they would most like to travel back in time to.
Noah Millman has a couple interesting observations about the results. I would assume that the popularity of the '20s among young people is mostly aesthetic. Also, it struck me as interesting that those old enough to have been adults throughout the 1990s view it least favorably, while those who were under 5 in 1990 view the period most favorably, followed by those who were 6-20 in 1990.
Personally... Well, actually, I don't have a strong opinions about decades. Best of times and worst times and all that. Though I notice that the current focus of my historical attention (the teens) is everyone's least favorite decade. There's some fairness to that, though if it has to do with the Great War people should arguably dislike the '40s even more.