Nonfiction fuels my world-building, but plot ideas can come from anywhere. Since I typically start stories from a title, poetry is particularly helpful--it provides great jumping-off points, even if my title eventually changes.
Anything that stirs my soul or senses inspires me to write.
I have been inspired in the past by Stephen King, Dean Koontz, and others in the suspense genre.
OMG there are so many books that inspire me Twilight series, Balgarion series, The Anna Strong chronicles, oh so many more did I mention that I have an over active imagination, probably not but you do now. Oh and to help me prep for a battle scene it really helps that I'm married.
A lot of writing...too much to list here and I try not to pay attention to any of it. It's too easy for a writer's voice to get jammed in my brain, and while I'm not copying the words, I often copy a writer's tone which is worse, at least for me, and gives the work an inauthentic tinny sound.
I have a wide variety of tastes, but personally prefer stories that tug at heartsrings.
You know -- that's a good question. Well-crafted writing of any genre is inspiring to me, but more often, my muse is arroused by experiential phenomenon. For better or worse, I see most everything through a comic filter. When something tickles my innards, strikes me as ironic, or effects me emotionally, I'm off and running... to the nearest keyboard.
Mostly classics and realistic fiction. Occasionally poetry.
Through the Looking Glass and What Alice Found There by Lewis Carroll, anything Clive Barker, good writing in general. I can read a well-written article by anyone and get inspired. Inspiration isn't the difficult thing to find these days it's the time to actually put it to good use.
Mostly romance or mystery book, or nowadays I like to collect children storybook as well.
I'm into Suspense and thrillers, I like to be on the edge of my seat not knowing what is going to hnappen next. That is how I write my books, I keep the readers not knowing what is going to happen next!
books about life like those of Paulo Coelho inspire me most!
Poetry of philosophical books, like Walden. I don't really prefer to read best seller fiction; I'd rather a history book or a classic, but any books that really make me think are so inspiring.
Authors who've managed to see or interpret the world or an idea in a new way, and explain it in fresh or innovative terms. I would think Henry Miller must have been this kind of writer, as was Joyce, Whitman, Baudelaire, or all the great masters who saw in a new way.