I'm 27, so I didn't vote, but from the list, I've read Vance, Leiber, Howard, Tolkien, Moorcock, Mieville and Pratchett. Tolkien got me into the whole fantasy thing, and reading Vance, Leiber and Moorcock has noticeably enhanced my enjoyment of D&D by finally shedding light on the origin of some of D&D's idiosyncrasies.