I'm still not clear what you mean by appreciating others' literature. You mean, people who only read Shakespeare, for example, then you should read Shakespeare just to humour them. Or Dan Brown, I suppose, is a recent example, so one would read Dan Brown just to see why everyone dislikes his writing so much. Or reading something just because somebody else had... though I guess at school we are forced to read books to "appreciate others' literature" because they're set texts.
I read
The Da Vinci Code because I got tired of seeing it at the top of every bestseller list in every bookshop I went into, so I bought it. I read it. I have nothing more to say. It wasn't a fantastic read, but then neither were most of the books I read last year. I hate Poetry because I don't understand it, and don't see the point of it really, so I couldn't care whether my mum, my best friend and even the Queen begun reading poetry and exclaiming how marvelous it is, I doubt I'd touch it. I like Shakespeare but mainly the histories,
Henry V in particular, and I think the comedies are greatly over-rated. I like reading other playwrights though, e.g. David Hare, Henrik Ibsen, Willy Russell, Caryl Churchill and even Aphra Benn.
Anyway, I read mostly to learn things. Whether it's history, geography, scientific facts, interesting tidbits about certain occupations, mostly things concerning people though. People are so fascinating, and reading about them is also just fascinating. I suppose, then, you could say I enjoy learning about things, people in particular; why they do the things they do, what makes them happy, sad, angry etc...
I rarely put myself in the places or situations that the book is describing, but usually read it from an outsider's view, which I am, but I know some people can "suspend disbelief". I suppose that's why I don't read fantasy, science fiction etc, because there's enough interesting things to read about that are real, without delving into make-believe. I suppose that might change as I mature
I can't remember any of the other options so I guess I should leave that there... sorry for the ramble.