Because he's not full of bullsh*t, a vindictive liar, or "promoting laziness" ( I don't know of another way to phrase this right now, but I think you understand). I feel that if Trump were to become president, he would start calling out the Senate and Congress on their sh*t, and put people on blast for doing things they shouldn't be doing (like how everyone's pûssyfooting around the Benghazi accusations with Hillary and the other Clinton shinanigans.).
Also, Trump isn't very PC, which seems to be a huge problem in Europe right now, leading to years of sexual assault on young girls because authorities didn't want to be labeled racist. This PC culture needs to stop, because it's only fueling more hatred.
I don't think Trump is going to fix America in his term, but I strongly feel like he'll be a catalyst for the change that we need.