If you enjoy long series and epic fantasy 3 come to minds, George R.R. Martin's
A Song of Ice and Fire, this seres features outstanding characterization, multiple POV's, and the msot subtle narrative full of surprises, and many potential fan debates and discussion of any series in the sub-genre:
A Game of Thrones
A Clash of Kings
A Storm of Swords
A Feast for Crows
A Dance with Dragons (forthcoming)
Winds of Winter (forthcoming)
There will be 7 in total at least.
For a more high magic world, featuring a huge worldbuidling effort. I'd go with
The Malazan Book of the Fallen sequence by Steven Erikson:
Gardens of the Moon
DeadHouse Gates
Memories of Ice
House of Chains
Midnight Tides
BoneHunters (forthcoming)
Dust of Dreams (forthcoming)
Hounds Toll (forthcoming)
Reapers Cale (forthcoming)
Crippled God (forthcoming)
There is also
The Prince of Nothing by R. Scott Bakker, a trilogy that was recently completed, and is thw first seqeunce, that wil be continued in another trilogy or duology entitled
The Aspect Emperor. The first 3 books are:
The Darkness that Comes Before
The Warrior Prophet
The Thousandfold Thought
This is a dark, and refreshingly unsentimental series.
Those are IMHO the 3 best
epic fantasist in my mind currently.
I have some further suggestions that can be viewed
here, and continued
here (Total of 200+ suggestions with brief synopsis)
and quite a few D & D series (Legends, Icewind Dale, LEgacy of the Drow etc...).
If you enjoy this stuff you may enjoy David Gemmell's
Drenai and
Rigante work.