Clarke's pretty much the only one of the Big Three I really enjoyed as an author.
I find myself nodding at this. Of the "Big Three," I think that Clarke's is the work that will endure the most, especially for short stories like "The Star" and "The Nine Billion Names of God."
Heinlein, I think, will be largely ignored and forgotten -- a science-fiction Washington Irving, essentially. (In his time, Irving was a major author, he defined the American voice. Outside of "The Legend of Sleepy Hollow" and "Rip Van Winkle," no one reads Irving's work today.)