Trump is very sure of himself, likes to do things his own way and happily bucks the trend. He has a history of cheating on his wives, sexual misconduct and an eye for attractive women.
In business, he has built a real estate and media empire, but has been bankrupt four times. He is known for his shrewd business sense, and for being miserly at times. He is the only presidential candidate not to release his tax returns.
He was elected because he advocated change and he was brought to power as part of a populist movement. Since winning the election, his tone seems to have mellowed, but it remains to be seen what type of leader he will be.