Will Donald Trump be a good President, and why?
The question shall be judged by the final - i.e. not the average - approval rating of Donald Trump as determined by the combined approval rating of FiveThirtyEight at the end of his first presidency term, expected to finish in January 2021. If Donald Trump's presidency ends earlier, it shall be the last rating prior to this. Here is to the source: https://projects.fivethirtyeight.com/trump-approval-ratings/
If Donald Trump's final approval rating puts him among the top 3 (1-3) presidents since Harry Truman the questions shall be judged "Very Good", a lower top 5 rank (4-5) is "Good". A place among the bottom 3 (11-13) shall make him "Very bad", a better bottom 5 rank (9-10) is just "Bad". A rank from 6-8 will be judged as "Average".
Note: The Gallup source originally defined for this question's judgement could be biased and will not be used: http://www.gallup.com/poll/116677/Presidential-Approval-Ratings-Gallup-Historical-Statistics-Trends.aspx