Your voice is very good and mature for a 16-year-old :]
Do you actually use like a voice changing thing which changes what your voice sounds like?
'Cause it sounded like at the end of Halo 3, you had to turn it off to sing? Bravo :)
Wanna check out my voice Demo? I'm English but i only recently started experimenting with voice acting xD. It's under my signature (try <a href="http://www.newgrounds.com/bbs/topic/207423/441">http://www.newgrounds.com/bbs/topic/2 07423/441</a> at the last post)
Comick
Oh man! That was great!!!! And seriously, you sing perfectly, although I was laughing so hard imagining Master Chief singing that XD Good job!
ps- I especially liked when you said "sweet" for the Doritos- lol