Best reason. If elected, The Donald might actually do something in office rather than just going with the flow. The polls have 70% of the population saying America is on the wrong track. Trump might get us back on the right track. Hillary won't. She is totally owned by Wall St and special interests (who paid $40 odd million for her). She thinks things are just fine, and is promising not to change anything.
Of course, it would be nice to know just what Trump might do in office. So far his campaign promises have been either vague, or improbable. He needs to work on that. At least he isn't owned by any one.
Trump is loyal to the United States and to its people. Hillary is only loyal to Hillary. I really do think The Donald will act in the best interests of the country. He may not always get it right, but he will try. Hillary is more interested in lining her own pockets.
Trump does know something about business in the real world. He has survived, and even prospered in the New York real estate business, a very tough business. He knows how to read a balance sheet, he knows the difference between income and expenses, he knows what it means to meet payroll. I doubt that Hillary even knows how to balance her checkbook.
Trump might even fix the federal income tax. Close every loophole, lower every rate. Hillary won't do that.
Trump won't try and take everyone's guns away. Hillary will.
Trump will sign an Obama care repeal. Hillary won't. Obamacare is such a drag on business that it has sucked our GNP growth down to less than 1%.
Trump will nominate decent Supreme Court justices. Hillary will pack the court with lefties.