Now that you've gotten answers from both TheDrake and me, how about answering your own question:
Your answer was that Kasich is the the only R candidate in recent memory you could ever vote for over a D? I guess that's something.
Biden vs Romney
Romney
Biden vs McCain
Neither.
Biden vs Bush 41
Neither.
You see, for me, the issue isn't who I prefer, but whether I would vote for someone
at all. Now if both candidates are at least 'ok' or better, certainly I'll decide which I prefer. If I actively dislike any candidate there is no way I go out and vote for that person and endorse them. IMO that corrupts the system hopelessly and creates mandates that in reality don't exist. People should not ever be in office that are actually disliked, just less than their opponents. Would you hire someone as your CEO if you hated them a little less than the other applicants? Thinking of it that way, it's absurd and twisted logic to use voting as a negative resource.
Of the selection here, I wasn't personally offended by Romney in any particular way and don't think I'd be going against my conscience with him heading the executive. With all the others, yes. And certainly it's the same with Hillary and Trump (that neither would get my vote). Of the 2016 R candidates, for instance, I find it hard to think of any that were acceptable, other than perhaps Rand Paul. I didn't actually think he was a good candidate but he didn't offend me. And although I don't agree with extreme libertarian views, I could vote for someone who is 'good' even those I disagree with their politics. On the D side you know I feel the Bern, and actually in 2016 I didn't think that O'Malley guy came off badly other than he was overshadowed to the point of hilarity.