You are probably looking for the typical Redditor answer as to how bad he will be remembered, but I think it will be the opposite:

He will be remembered as a builder and renovator, and his buildings will stand and be admired for years after he is gone.

He will be remembered by his family as a good father, a good grandfather.

And after much time has passed, people will laugh and at some of his tweets, and perhaps realize how funny he actually was, as well as brutal at times.

Some people will marvel that no matter how hard they tried to get him, he would not back down. Fighter to the very end. Swimming up stream against the flow, and never a quitter. He will be remembered as a no nonsense New Yorker through and through.

He will be remembered as an imperfect man, but one who loves the American people.

But most of all, good or bad, no one will ever forget one of a kind, Donald Trump. He will he talked about in good ways and bad ways, and every which way for years to come.