What it would tell us, if only we would study our reflection for long enough, is that, what is most 'humanly desirable' in the production and maintenance of mentally healthy, sociable human beings is, as two of the most celebrated bards of the twentieth century pointed out, fundamentally 'easy: all you need is love'.
Trump might want to try new things, which renders himself as a more risky option. However, beforehand predictions often fail. In any case, the new President must be supported by everyone and history will decide whether he/she was successful.
Politicians who become PM by accident or circumstance rather than through being opposition leader or winning an election (James Callaghan, John Major, Gordon Brown) often end up disappointing the nation. Behind the surface confidence and episodic displays of clarity of purpose, the signs are mounting that Theresa May could be the next addition to that list.