I've never been a fan, because he's a crass, narcissistic blowhard who's spent his whole life trying desperately to buy class, celebrity and adulation. He has no apparent respect for women, given his penchant for responding to criticism with offensive remarks about their looks or bodily functions. While I'm no fan of Rosie O'Donnell, the public pissing match he engaged in with her a couple of years ago displayed a childish vindictiveness I sure as hell don't want in a president.
While his four Chapter 11 business bankruptcies are not unusual as he's pointed out, they resulted in humiliating terms that personally cost him hundreds of millions, which forced him to sell his yacht and airline, and stripped him of all power over business decisions, although in at least one instance he was allowed to retain a meaningless title as CEO. His "university" was little more than a sales scam that defrauded thousands by grossly misrepresenting the curriculum and qualifications of faculty allegedly "hand picked" by Trump, and delivering almost nothing that was promised. The case is ongoing, and there could be some embarrassing revelations later this year.
He promises to "Make America great again" and create millions of jobs, but all his branded merchandise is made in Mexico, China, and Vietnam.
He demonstrated poor judgement and appalling ignorance by appearing last fall at an event sponsored by Veterans for a Stong America, a bogus organization with no real membership that basically was formed just to make money for its founders, and which was barred from doing business in California before the Trump event. That should have been easy to check ahead of time, but he didn't, and it was a careless mistake.
Then there's all the Birther crap he was ranting about a couple years ago and seems to have conveniently forgotten. If he believes it, he's an idiot; if he doesn't, then he was perpetrating some sort of deranged publicity stunt hoax that is beneath the dignity of a person who wants to be taken seriously.
I give him credit for being a masterful self-promoter, but then so are the Kardashians.