My reading habits change according to what I'm doing at the time.
When I was studying A level Literature, I read many classic novels (and forced myself to read every Shakespeare play), just to immerse myself in the genre.
When I was teaching Imperial History, I read Kipling, Conrad and others, to get a feel of the times.
When I was involved in socialist politics, I read George Orwell and Bernard Shaw as well as Marx.
And so on....
But as to taste, I have always preferred thrillers, although as time has gone by, I find it increasingly difficult to be 'thrilled' by the end of the novel, as I have usually worked out exactly what is happening from the second chapter.
So perhaps it's time for a change.
