Fairly exclusively read fantasy stuff, and I only rarely dig into lesser known stuff so I won't offer up much in the way of surprises, but...
A Song of Ice and Fire series, for the epic scale and gritty starkness
The Wheel of Time series, which has taken a lot of flak the past decade (some deserved) but is also on an epic scale
The Dresden Files series, for the easy reading humor (warning: actual quality doesn't start til a few books in, IMO. first books are still amusing though)
Any and all things Brandon Sanderson... well ok, I haven't read his YA stuff, but I have read everything else of his. Runs the gamut from one-off novels to the beginning of his own epic-scale series that has just got underway. There's a bit of nerdiness to his writing that I find a bit... indulgent, but his stuff is fun reading often with some twist endings. For those that love looking into fantasy worlds beyond what is focused on in the books, his stuff has a great deal to be discussed too. One of his novels is available for free on his website in pdf format (click
here to begin reading)! I could talk a lot more on Sanderson given that Martin, Jordan, and even Butcher have all been discussed on here a few times, but Sanderson I don't think really has beyond his filling in for the last few Wheel of Time books. Maybe we should fix that some day. :p
If I had to throw in something less well-known, I will suggest a pair of two-book series by Sean Russell. Moontide and Magic Rise (World Without End and Sea Without a Shore) then the prequel series The River Into Darkness (Beneath the Vaulted Hills and The Compass of the Soul). Victorianesque enlightened era meets a hidden lost era of magic. I'm not sure these books are in the same league of enjoyment for me as the above, but a) I'm reading them again at the moment and b) probably a better contribution if anyone is looking for new material. They're a bit old, but shouldn't be too hard to find if one is inclined.
edit: bonus addition! Since you included 'classics' in the list, I will take this opportunity to mention the only classic I ever actually was fond of:
Tsurezuregusa. Japanese, from around 1331 according to Wikipedia. I read the Keene translation and I love the book to pieces. It's essentially a collection of random thoughts of this old Buddhist monk, some less than a page long, ranging from humorous to historical to observations of human nature (my favorite being a lament on how boring and uncouth people of his day spoke compared to how they did in his past) to musings on Buddhist ideals. It's charming. I suggest finding it in a library, however, as I've found it to be relatively expensive to buy a copy.