I've just never been able to get into most books older than Dune, and even then Dune is pretty old when it comes to books I like. Not as old as the LOTR books obviously, but outside of LOTR and the older Dune books I don't read much older than the 80's, and even then most of my reading is late 80's to present day. Before that, most books just aren't written in a way I like, even if they had premises I might have enjoyed from more modern authors.
You are missing out on so much but you have pretty much made up your mind so no effort to dissuade you.
Oh.. and that you elevate Star Wars and Star Trek novels (which i also love but consider to be mostly mediocre, action adventure writing you can read casually on a train) to be the same league or better than classics by Clarke or Asimov is very telling.. at least to me. Why not risk something and actually read one of their books fully with an open mind (personally i recommend the original Foundation trilogy by Asimov).. it something else than reading how an XWing does a special maneuver and then blasts a Tie Fighter for the xth time.
And damn.. did try to persuade you. Oh well..