Light Novel
If I like the anime, I usually go looking into the light novel. Of course, I have to wait for a translation. A light novel is quite an investment, as any book is, so I look at it as me liking the story enough to back it. I don't read translations online, I always purchase the book. One, because I love having the physical copy, and two, to support the author.
The light novel, as with generally any book, usually goes into quite a lot more detail than the anime adaptation. You get a more in-depth look at scenes. You can see what's going on in the background. The author can tell you what a character is feeling rather than you trying to decipher it yourself. You also get to exercise your imagination, creating the different scenes in your mind. Of course, illustrations help you with this as well.
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