How I missed this thread I have no idea.
Dislike intensely:
"Sword of Truth" series. Actually, the first book is amazing and then the author gets preachy and rapey.
"The Dark Tower" series. Confusing for the sake of being confusing. I know people love this but I just couldn't do it.
Outgrew:
"The Belgariad" Loved it when it first came out but I outgrew it a long time ago. And the ending? Ugh. No spoiler tag, but it's about as cliche as cliche gets.
"Xanth series" or anything by Piers Anthony, really. There's a thing I like to call the "Piers Anthony Effect" where the first book rocks and the rest of the series goes downhill precipitously from there.
"Myth series" by Robert Aspirin. These books start out fine and then spiral out of control. It then kinda just peters out & stops.
Like:
"Battlefield Earth". I know it's from the scientology guy and the movie sucked, but the book is actually pretty good.
"Dark Border Series" by Paul Edwin Zimmer. Older series, only 2 books. They say there are 4 but the last two are a damned lie. (In other words, stop after the second.)
"Silverlock" by John Myers Myers. Great book, but the sequel was tepid at best and unnecessary.
"The Chronicles of Thomas Covenent" by Stephen Donaldson. Good series about a pretty up & down hero/anti-hero.
Love:
"Dresden series" by Jim Butcher. Love, love, love these books and man do they get darker and darker as time goes on.
"A Song of Ice and Fire" otherwise known as the Game of Thrones series. Talk about a good series, although it has slowed down a lot in the last couple books. I hope he's not going all Wheel of Time on us.
"Wheel of Time series" by Robert Jordan. Now, I know this series takes a lot of crap and that crap is well earned. Jordan wrote himself into several corners and LOVED tertiary characters and fluff. When he died it was the best thing that happened to the series. Brandon Sanderson cut through all that crap and just wrote what needed to be written. The last three books were the best thing since the first two books. I know the middle 4 or 5 books are a slog, but worth it in the end.
"Memory, Sorrow, and Thorn series" by Tad Williams. Amazing series that has essentially the same ending as the Belgariad in cliche, but written so much better it's not even funny.
"Lucifer's Hammer" by Larry Niven & Jerry Pournelle. One-shot book about the end of the world. Well, maybe not the end, but a blow to it. Maybe a bit dated, but still worth a read.
"The Chronicles of Amber" by Roger Zelazny. Someone already mentioned this and I wholeheartedly agree.
New books worth trying out:
"The BSI Files series" by Mark Everett Stone. Think Men in Black meets Dresden Files. The first book is "
Things to Do in Denver When You Are Undead" and it's a great series. (By the way, I apologize for the link, I just realized it's my associates link.)
"
The City of Smoke and Mirrors" by Nick Piers (Again an associates link, sorry!) This is the first novel from this guy, very inspired by the Teenage Mutant Ninja Turtles. It's about a mutant Armadillo crimefighter. Again a lot like Dresden.
I could go on. And on. And on.
But I'll stop now. I know I've left off a lot of good stuff, though. Maybe I'll add as I go.