Every nerd has their favorite fantasy-based book series. For some, it's a classic like Tolkein's run of Hobbit-based books. Maybe they were really into the Christian analogies of Narnia. It could be something newer, like Harry Potter, or Percy Jackson, or, if they're like me, they got their start on David Eddings' Belgariad series, or perhaps Margaret Weis and Tracy Hickman's Dragonlance series. There are so many series out there now, staring magical detectives, heroic knights, orphans with mysterious destinies, and twisted schemers that it can be hard for someone to pick just the right series to latch on to and claim as their "favorite."
I didn't have that problem, because my father was (and still is) a big-time reader, and introduced me to so many series that I had my pick of among some of the best. He got me into David Eddings, Terry Brooks, Raymond E. Feist, Dan Simmons, and so many other authors, but I think (hope) he'd agree with me that the ones I loved the most to the point that I bought the pretty terrible video game tie-in would be The Death Gate Cycle, the seven book series by Margaret Weis and Tracy Hickman that, for some unexplainable reason, isn't bigger than their Dragonlance stuff.