If you had read my words, you would know I obviously "plan" to live around 85 years, and the verb «think» would have suggested to you that I don't have an infallible way to know what the people of the future will enjoy reading.
I thought you were asking sincerely, but it seems you're either trying to start a flame with your sarcasm or just not reading through my words.
If I want to read good sci-fi or fantasy I'll pick Bradbury, Asimov, or any other brilliant author I _think_ will still be read in 500 years.
Go and read whatever you like, I couldn't care less.
EDIT: Actually, it doesn't have to be like this. I'm sorry for being unnecessarily snarky when you told me how you evaluate books. If I may, I'd like to rephrase my question too: "Keeping in mind specific volumes, what is a book that you could see yourself feeling sorry for somebody having not read before their funeral?"