If Hillary were to win: I see her being fairly similar to what we've experienced the last 8 years in the Obama administration (to not incite the riots we've had in other political threads, I'll leave whether or not continuing in the Obama mold is a good thing or a bad thing up to the interpretation of the reader). I imagine she'll long to have something "defining" somewhere in her presidency, similar to Healthcare Reform for Obama. I imagine she'll rally for whatever cause she picks and push it through regardless of public approval, or whether it's actually beneficial to society, just so she can claim she did something during her term.
If Trump were to win: I see him being completely different than anything we've ever seen in a major public office. I imagine his term would begin with him coming in and bellowing out how he's going to do X,Y, and Z and there's no one going to stop him from doing it. He'll soon realize that isn't how the world works, and that he'll have to actually play nice with Congress and State Legislatures in order to get anything accomplished. He'll probably succeed in toning back the "PC-ness" of the federal government - and will do a decent job at least addressing some of the problems that have been neglected for awhile (foreign aid, immigration, government assistance programs, etc.), and getting those issues talked about from a different angle - even though I doubt any monumental reform will come of it, as Congress will most likely reign him in a little bit on this.
Regardless of who wins, I expect them to be a 1 term president, as I imagine every party in America will be seeing 2020 as an up-for-grabs election, and will have a few years to make sure they get a decent candidate on the ticket. And if we're fortunate - maybe a 3rd party (and maybe even a 4th) will emerge as legit contenders for the next election.