Wheel of Time: Good overall series. Books get a bit slow around 8-10 or so, but once Sanderson takes over it gets pulled tight and finishes nicely. 9/10
Mistborn: Sanderson's main claim to fame. Good series overall. A planned three arcs (two finished), based on a very fixed magic system. First three take place in basic technology, second set take place around 1910s or so. Third set to take place in futuristic society. A lot more character focused than most high fantasy. 8/10
Sword of Truth: Probably one of the most simple magic systems you can find (besides LotR, where it is 100% unexplained). Overall, the books are entertaining. Would place a low priority after others. 7/10
Inheritance: The Eragon series. Paolini is universally made fun of for his somewhat childlike writing style and his plots are rehashed. Nethertheless, the cycle is entertaining, at least more so than Sword of Truth. The fourth book sucked, though. 6/10
The Kingkiller Chronicle: One of the best series. Full of action, quick paced, excitable characters, etc. Ruthfuss is praised as writing some of the greatest modern fantasy, and I must agree. Only three planned books (two finished) that I know of, so pretty short. 9/10
Codex Alera: A pretty good series based on controlling spirits. The magic system is well flushed and there are some wow moments. It is definitely looking into if you want something that doesn't follow the old formulas. 8.5/10
Demon Cycle: Another
different fantasy series. The characters are interesting, but sometimes not so. Further, they don't act as natural as they should. However, the series and story are quite good. Book 4 isn't out yet, but is soon to be: book 3 leaves on a huge cliffhanger.
8/10
Farseer Trilogy: As I write these, I realize that magic systems really do differ from each other. This one isn't nearly as flushed out as you'd want, but it is OK. The last book was a bit odd and probably not as good as it could have been, but eh. I recommend it. 7/10
Lightbringer: I truly liked these. Only the first two books of a planned four have been published, but they each end quite nicely on their own (a bit episodic, I suppose?). The series has an innovated plot and magic system based solely on light. 7.5/10
Malazan Book of the Fallen: Currently reading this series, and it is by and far my favorite series I've ever read. The characters are generally all interesting and identifiable. Beyond that, it is an incredibly rich world with an even richer history. You thought ogres were innovative? See what this series has. The books tend to all take place at slightly different times (they intersect), with the later ones being a bit more linear. The first few books have completely separate characters, but they stay within the overall plot and the later books interweave them. While the series in overall length isshorter than Wheel of Time, if you added Malazan they'd be far longer. 10/10
Gentleman Bastards: A fun series. Don't take it too seriously: it's a fantastical thief series. 8/10
Nightrunner: Gay elves. What can be better? First and second books are OK, middle ones kind of blah, last one good. 7/10
Rifter: More gays. Books incredibly short. Finished series in a week? 9/10
The Stormlight Archive: Sanderson's grand masterwork. He's seriously been working on it his entire life. While in a slightly different scope than Malazan, this is seriously the highest quality you'll find. Only the first book has been completed of a planned ten, with the second one coming out later this year I believe. 10/10
Song of the Fallen: More gay elves. 7/10
Seriously, the last three are good, just not complex interwoven stories. They're romances, for god sakes, so two main characters.
If I had to pick one, I'd say MALAZAN (Book of the Fallen first, ofc)!