I do agree with Sheepy on the fact that Cruz is worse than Trump. Both are awful choices for presidency, but what reassures me slightly about Trump is that I feel that he's more competent than he lets on; he deliberately drums up controversy and intrigue to appeal to the Republican voting base. Cruz on the other hand is a 100% nutjob, who instead of funding drone strikes against ISIS, wants to bring back carpet bombing, which would cause catastrophic collateral damage to both innocents and property (as someone said earlier, he's been quoted as to wanting to make sand glow). Rubio seems to be the only remotely electable out of the Republican nominations due to his higher appeal to moderates than the alternatives.
As for the Democrats, I reassure myself about a Hillary presidency by envisioning her as Bill's meat puppet. She's a weak option for the Democrats, and I would have preferred Sanders, but her moderate stances are far and away better than the anti-progressive Republican stances.
One thing I can say for a certainty is that people are REALLY going to miss Obama when he's gone, no matter who wins.