Seeing as how I'm battling some flu-ey type bug, and I'm trying to set Math papers for the end-of-first-quarter exams, I'm going to send you over to Natalie Fischer's blog to read this VERY helpful post from yesterday about the difference between writing an adult voice and writing a YA voice.
This elusive voice concept has bugged me for some time, making me worry that my work may not even have one -- eek! The voiceless WiP! (since I basically just write from intuition, without thinking too much about all the technical bits and pieces...) But Natalie explained it pretty well. So I think there's hope for me and my "voice" :-) (or voices...)