You're about to fall down a wonderful reading hole. The general process most have is "wow Way of Kings was [okay to great], and I'm super interested about this world so I'm gonna read Words of Radia-OOOHHHHH MYYYYYYY GOOOODDDDDDD".

It took me a little to get into way of kings but then I read the next three books and the two side books in about six weeks.

Also if you haven't yet, the second Mistborn era is good to add to your pile once you've caught up with the Stormlight series as they're both within the larger "Cosmere" setting Sanderson has for the majority of his books.