Forward is not a destination. If you'd asked Hitler, Stalin, Pol Pot or their supporters if they were taking their nations forward, they'd have undoubtedly said "yes." Mussolini? Forward. Napoleon? Forward. Genghis Khan? Forward. Of course, Churchill, Thatcher, and Reagan would have said "forward" as well. So, that's why it's important to ask what difference it would make if we go forward for four years under Mitt Romney as opposed to going forward for another four years under Barack Obama.
1) Mitt Romney would try to reduce tax rates for the wealthy and corporations to spur economic growth. On the other hand, Barack Obama is likely to try to raise taxes not just on the rich and corporations, but on the middle class. He really wouldn't have much choice. Despite the class warfare rhetoric you're hearing, there is far more money that can be confiscated from the vast middle class than there is to be plundered from the relatively thin ranks of the wealthy. If you believe tax increases are the answer, then you go after the middle class for the same reason Willie Sutton said he robbed banks: "because that's where the money is."
2) Barack Obama has run trillion dollar plus deficits every year he's been in office and given that everything he wants to do comes with a large price tag attached, there's no reason to think the next four years would be any different than the last four years. At a minimum, that would mean further downgrades of our nation's credit rating, but it's possible it could precipitate a full-on Greek style financial crisis if investors conclude their money isn't safe here. On the other hand, Mitt Romney would be under tremendous pressure from his right to reduce the deficit and a further credit downgrade on his watch would be a devastating political blow that he'd be highly motivated to avoid. Romney wouldn't have it easy since Obama would be leaving him a full-on budgetary disaster to deal with, but he'd have little choice other than to make cuts if he wants to be reelected in 2016.
3) Barack Obama has made encouraging dependence part of his electoral strategy. The more Americans that are dependent on the government for unemployment insurance, food stamps, and welfare, the more votes he believes the Democrats will get. In order to swell the welfare rolls, he’s no longer demanding that welfare recipients work for their handout. Mitt Romney opposes that change and would put the work requirements back into welfare.