David Eddings 'The Belgariad' and 'The Malloreon' are a great series. I consider it one series because they have the same characters and same general story arc. Each one has 5 books in the series - the first time I read them, I burned through all ten in a row and was left wanting more and relieved it was over. I think that's what may have turned me sour on series that have more than 6 books, unless each book can stand by itself (like Piers Anthony's Xanth series).
I'll have to re-visit The Belgariad soon, my wife has read all 10 at least twice since I introduced them to her. I haven't re-read them in about 15 years.
I'm personally a Dark Tower fan as well...