In my view, Trump is the only interesting candidate. The others are just a rehash of the same-old same-old.
You can see how well Trump deals with real-world issues by how he is handling the RNC and the GOP establishment.
The other candidates’ qualifications are professional office-holding with terrible results and lofty speech-making, with the same results.
Sanders’ candidacy is noteworthy because he is not part of the establishment, or doesn’t appear to be. But he’s just another Obama.