I don't have playlists, I'm afraid; just CDs and a CD player.
Music doesn't tend to inspire what I write, and I don't listen to it while writing (too distracting), but I do often imagine my scenes taking place to music that I like. I enjoy soundtracky-type things too. ES Posthumus (the act behind the themesong of "Cold Case"), some Cirque Du Soleil, and Hans Zimmer are good examples. I'm also starting to like some of the more mellow "metal"-type music which doesn't seem like metal at all to me, like Within Temptation and the instrumental version of Nightwish's "Dark Passion Play" (which I've been listening to, and envisioning my writing to, like crazy lately). Oh, pretty much anything with a big orchestral sound and Latin chanting, too.
I'm a sucker for Era and Lesiem, and really love Globus's "Epicon."
And there are also songs where the lyrics make me think of my characters or their situations. I shan't get into all the different groups because there are just too many. The above examples are good for more epic soundtrack-type music though.