I try to listen to a wide variety of music, but generally what inspires me in terms of sound design is stuff by @big giant circles, @zircon, @Joshua Morse, and other people who have an established 'sound palette', because they have a distinctive set of sounds that emanate their essence, in such a way that you can tell when they've written a particular piece. That is, you listen to a piece by them, and can immediately identify it as theirs, because the sound design is memorable and innovative/unique/distinct.
I've also found that as you actually try to make certain sounds, you start to feel more inspired by them more easily. I didn't like dubstep music about 2 years ago, but after designing a bunch of dubstep basses, it's one of my primary musical genres to write.
You may find some ideas here in this playlist: