Book series that I love to read over and over

Liaden Universe - Sharon Lee and Steve Miller
PERN - Anne McCaffrey
Darkover - Marion Zimmer Bradley
Cinnabar - David Drake
Circle of Magic - Tamora Pierce
The Chronicles of Amber - Roger Zelazny
The Cat Who... - Lilian Jackson Braun
Brainship - Anne McCaffrey
Butterfly and Hellflower - Eluki Bes Shahar
Carousel - Sharon Lee
Chalion - Lois McMaster Bujold
Diskworld - Terry Pratchet
Elemental Magic - Mercedes Lackey
Elfhome - Wen Spenser
Vorkosigan - Lois McMaster Bujold
Ring of Fire - Eric Flint
Manticor - David Weber
Dune Chronicles - Frank Herbert