Least polarizing, least relevant, most boring election?

[Pollster]

1996 was incredibly boring. Most news outlets called it relatively early in the evening, and Ross Perot seemed more like a teenager desperate for attention than a candidate who was going to win a serious chunk of the popular vote (though he did still manage to hold Clinton under 50%).

I agree with the poster above that history will judge 2012 as boring, especially considering it is now sandwiched between 2008 and 2016. If anything, it will be seen primarily as the second election cycle in a row that Mitch McConnell should have become Senate majority leader but didn't because of the nomination and implosion of disastrous candidates in key races. The reelection of Barack Obama all but assured the candidacy of Donald Trump, so it may be remembered by historians in that sense as well.