Sword of Shannara series by Terry Brooks
Sword of Truth series by Terry Goodkind
Dune series by Frank Herbert
Wheel of Time series by Robert Jordan
The Lord of the Rings series by J.R.R Tolkien (NO smurfING WAI LAWL LAWL)
Lord of the Isles by David Drake


No, not all of these have a science-fiction twist to them, but are all well-worth your read.