Mercedes Lackey is my all-time favourite author. Her Valdemar series is awesome, and all her other books are fantastic. Next is Raymond E Feist & Terry Pratchett depending on who has the latest new release. L.E. Modesitt Jr has a series of books called The Spellsong Cycle which I loved, and J.V. Jones has a trilogy called the Book of Words which I enjoyed as well.

I also have half of all the Dragonlance books, and almost all of the Forgotten Realms books. I don't have a bookcase, I've got a library!

Another series is The Rangers Apprentice by John Flanagan. It's primarily for younger readers, but they are really good!

That's all I can think of for now, but I'll go through them later & find any that I've missed.