Wheel of time i used for my dark elf team, so have to look for another theme. So far i used Wheel of Time, Anvil of ice (not sure what the series was), Discworld, Wild Cards and Deathgate (quite hard to find enough females in this one to name my amazons :) ).
Some of the other series i got available at home are almost all books from Robin Hobb (the seeers, living ships, etc.), sword of truth, game of thrones, dark tower (havent gotten far in this one), and some others. But for some reason none of them have a real appeal yet for me. Perhaps because i cant really think of a nice thing to do with the names and a human team.