Two things have turned me off of him, though I love his positions:
1) He's got this greasy, disengenious feel to him. The various shenanigans in the completed primaries, and when he's doing commercials, show him to be a bit smarmy.
2) When he promised to endorse Rubio, he showed he was lying to us all along. He's part of the globalist/elitist pack.
That leaves Trump, for me.
I think he may be getting bad advise or his true hidden colors are coming out.
My opinion of him has changed, something about him has definitely changed also.
Go Trump!!