I've just finished part of a fantasy series, GRRM's A Song of Ice and Fire. The other two books are yet to be released.

I'm mostly into science fiction/fantasy novels.

I know of the Harry Potter series, the Dark Tower series and a few others. But I want a few recommendations.

So what are some good sci-fi/fantasy series out there other than the ones mentioned above?

Oh man if you like that stuff you gotta check this out.
Have you ever heard of dragonlance? Its a world in its own right and has a ton of different authors with different stories that take place in that world. (the authors all have some sort of contribution to the creation of the world too)

But the main narratave and what every other author in the series base off of is the two writers margaret weis and tracy hickman. These are the creators of the dragonlance world and are the 'main' stories of dragonlance.
Also just like George RR martin's books, the dragonlance world is a created world derived from the d20 pen and paper game.

Anyway the main books im talking about is essentially an 11 book series (which are all out). The first book came out in like 1984 around there, its titled Dragonlance Chronicles;
Dragons of Autumn Twilight. which is followed by
Dragons of winter night. then
Dragons of spring dawning.

These three books are the original books in the dragonlance series, and i recommend you check those books out and decide wether you like them or not. I can tell you that after the first initial trilogy, the books go more in depth and have much better writing.
The initial Trilogy is about a group of companions that meet up after years of not seeing eachother and they get thrown into a war, in which dragons (thought not to exist) have appeared with the enemies armies. The companions must then find proof that the gods returned to the world (they too were thought to be gone from the world) and with them bring healing magic. Its an amazing trilogy, and its the trilogy that 'started it all' for the entire dragonlance world.

The next trilogy that follows that (which is by most fans regarded the best trilogy of dragonlance) is about two twins (some of the companions from the first trilogy) who find themselves travelling back in time. One twin is a huge muscled warrior, and the other twin is a sickly black robed mage who sold his soul to a a long dead lich for ancient knowledge and power. the twins find themselves in the footsteps of that very same lich feeding off the mage's life, repeating history. This trilogy is mostly back in time, giving insight to huge historic events in the history of krynn.
The title for these books are Dragonlance legends:
The time of the Twins
The War of the Twins
The test of the twins

Anyway the books go beyond that, but before worrying about any of that, you should definitely check the first two trilogies out, greatest books ive ever read, yes even better then george RR martin's books imo.
Remember, Dragonlance, Authors Margaret Weis and Tracy hickman.

Hmmm, I looked at the reviews and they were pretty solid overall. I was asking because I don't like to go just off of reviews.

I heard Terry Goodkind and Terry Pratchett are good too.

If you liked George RR Martin's works, you should try the Malazan book of the fallen series. It's 10 books long by now, each numbering at least 700 pages. It can be a bit overwhelming because there's a lot of stuff going on, but it's very rewarding if you follow it properly.

I quite enjoyed Peter Hamilton's The Night's Dawn trilogy, though his writing style can be a tad hard to adjust to at first [as well as the gargantuan length of the series, I think it comes out to some one and a quarter million words total?] If thousand-plus page books are your thing, it's a good sci-fi series.

I have to second Dragonlance. I've collected almost all of the books from the First Generation (the Second Gen svcks) and really do love the series. But my suggestions are different from The Sentinel...

You need to be warned that the series started backwards. The intial group (Dragons of ... winter, spring, autumn, etc.) actually are the end of the 1st gen story (and summer actually heralds in the 2nd gen). It peaks your interest but also leaves you with a whole lotta "what the.." questions. If you want to start that way, then more power to you. As for me, I prefer to start things from the beginning and work my way from there. Strangely enough, I just lucked out and my first book actually was the very beginning of the story. Should you want to do that, then you'd read the Meetings sixtet starting with "Kindred Spirits" first and work your way through those 6 books. Then from there is your choice.

Also, even though I agree Dragonlance Legends trilogy (Time of the Twins, War of the Twins, Test of the Twins) was one of my favorite to read, I dare say you shouldn't read that until you're at least a little bit acquainted with the series and all the characters. It will definitely ruin quite a few surprises along the way if you start with it.

Beyond that, it's really hard to say how I'd tackle the series. It has a huge collection of books that explain just about every detail of the universe, including the elves history, human history, fables, etc. It really just depends on what part interests you and what you want to read.

Not a series, but China Mieville's books are pretty good. Embassytown is probably one of the most interesting sci-fi books ive read in a while.

A very readable, not too taxing series (if you want a change of pace after ASoIaF) is Jack Campbell's Lost Fleet series. Loosely based on Xenophon's Anabasis, it follows a fleet of spaceships trapped deep in enemy territory as it fights its way back home. The battles are fantastic, there are some interesting fleet politics in between, and its focus on its protagonist makes it a straightforward read. I burned through all six books in two months.

For something more complex but still pretty exciting to read, Richard Morgan's Takeshi Kovacs trilogy is great. The protagonist Kovacs is an elite operative ('Envoy'), downloading his personality into bodies of varying quality on different planets as the despotic UN Protectorate requires. There are some interesting explorations of what being able to download and backup your personality does to society and individuals, and Morgan is a very good writer - he makes you sympathise with Kovacs even though he's a complete sociopath. Personally I thought the best one was the first, 'Altered Carbon', but it's by no means the consensus. The best way to describe 'Altered Carbon' in a nutshell is - cyberpunk noir. Give it a try if that sounds like something you're even remotely interested in.

Terry Pratchett is good, his books are mostly self-contained too. Keep in mind though that his books are not 'serious' fantasy like GRRM, there are heavy doses of satire and comedy in his books generally. I've read about half of his books, my personal favourites out of those are 'Mort' (prominently featuring the best Discworld character, a personified Death who TALKS LIKE THIS) and 'Monstrous Regiment'.

Terry Goodkind.... not so much. The main protagonist is kind of an annoying Gary Stu. If you want a somewhat good Goodkind book, go with 'Pillars of Creation'. If you're interested you should go into it blind, so I won't spoil much, but its main virtue is that that protagonist doesn't make an appearance until you're well into the book.

I've read his Commonwealth Saga, which I thoroughly enjoyed while I was reading it but was very let down by how it concluded. For such an epic it just seemed to fizzle out and end on a whimper.

http://en.wikipedia.org/wiki/New_Crobuzon