Li: if you like "The Black Magician" Trilogy you will like the book series "Age of the five" by the same author, and i happen to have heard a rumor that she is working on a sequal to "The Black Magician" - which I am looking forward to read when it get's published... She is a captivating author...
My absolute favorite fantasy author will always be Mercedes Lackey! She has written about the realm of Valdemar for ages - which is an incredible series of books, titles worth mentioning:
"Arrows of the Queen"
"Arrow's Flight"
"Arrow's Fall"
"The Oathbound"
"Oathbreakers"
"Oathblood"
Besides her realm of Valdemar, she also writes stories about a psychic detective named Diana Tregarde (also amazing to read),magic fairy tales based on the fairy tales we all know from childhood (ex. sleeping beauty) and magical tales spun around the scene of the real world...
Another of my favorites is Anne Rice - for the time being I am reading "Pandora", for perhaps the 10th time since I bought the book several years ago... All her vampire novels are worth reading...
Of course I have to mention Anne McCaffrey... Her dragons of Pern series is truely amazing, although I am not the biggest fan of the books written with her son in this series... She has also written a series about the unicorn girl Acorna (this series is one of my favorites as well) and a trilogy about the crystal singer Killashandra (I read it so often it's about to fall apart)...
Another fantastic novellist is Jaqueline Carey - I actually ended up buying her first book out of curiosity and the lack of anything in the bookstore of interest - but read the first book in an afternoon and bought everything else ever since... Her first book is called "Kushiel's Dart" and is a somewhat erotic fantasy novel without ever becoming cheap in it's language... I find the series amazing and look forward to reading the next book she releases...
Every fantasy lover has read something of J.R.R. Tolkien (or at least most have) and I have a lot of his books on my book shelves...
I have the whole Harry Potter series, although not such a big fan as to be saddened by the en of the series... I've loved every book in the series and loved them, especially the fact that there is nuances in the stories that appeal to kids and others to adults...
other authors on my favorite list:
Robin Hobb (both under her own name and under the name of Megan lindholm)
Jonathan Stroud
Ian Irvine
Kate Mosse
Jude Fisher
Steven Erikson
Scarlett Thomas (The end of Mr. Y)
Diane Setterfield (The Thirteenth Tale)
David Eddings
Douglas Adams
Christopher Paolini (the series about Eragon)
I have a passion for fantasy novels and would that I could write one myself and fantasy novels including dragons are my alltime favorites