I'm focusing more on Congress (especially the Senate) than on the Presidency this year. Along those lines, the apparent Paul Ryan VP selection gives me a lot to be happy about.
If there's one kind of campaign that Democrats feel confident about aggressively running, it's one where they attack Republicans as a bunch of Scrooges who will fire you and starve your grandma. Paul Ryan's budget and his support for Social Security privatization provide a perfect target of that kind. By elevating Ryan to the VP slot, Romney has made questions about these topics relevant to every race everywhere. The downticket effects of bringing out Republican House and Senate candidates' unpopular positions on these issues are, for Democrats, a nice side effect of Romney's choice.