Good fantasy series

I've never read much fantasy in the past. I was a lit major in college and there always seems to be an unfair stigma on fantasy in academic circles, so I never really gave it a fair shake.

My girlfriend finally convinced me to read some of it, and I've enjoyed pretty much all the series I've read so far. I'm a pretty voracious reader; I blew through The Wheel of Time, The Dark Tower, A Song of Ice and Fire, Book of the New Sun, The Dresden Files, and the Harry Potter books in the span of about two months.

So, I'm looking for more suggestions for good fantasy series to read. Any help would be much appreciated.

The stigma on fantasy is by no mans unfair. Same goes to sci-fi. 99% of books in the genre are absolute garbage... and the remaining 1% is merely mediocre. I seriously doubt you could find a purely fantasy book that had any merit except for author's imagination.

That said, you might consider reading Tolkien, because he condensed all his life's imagination into his two big works. Writing is mediocre, as always (unless you consider the likes of Bram Stoker, Lovecraft etc., good writers).