There's no way to know who will make a good Jeopardy! host

The A.V. Club

The half-dozen guest-hosts have shown that it’s anyone’s guess as to who is going to be able to fill Alex Trebek's shoes effectively. "Some people that seemed like they should be a slam dunk—even in terms of basics, like ease with the camera—have stumbled, while others who appeared to be strange choices turned out to be inspired," says Alex McLevy. "It’s why (LeVar) Burton’s curriculum vitae might not end up mattering much, no matter how good a fit it looks on paper. The skills these guest hosts have brought from other TV shows, or even wholly other careers, don’t necessarily translate into making for a good Jeopardy! host. And while it would be easy to say that the je nais se quoi required is akin to 'Be as much like Alex Trebek as possible,' that isn’t true. The best replacements thus far have managed to square their personalities with the demands of the job, not subsume them in a clunky attempt to be something they’re not."