Very good demo
Nice voices make it longer with more accents and voices, So This was a "NICE-VOICE-DEMO" you have here, the voices are decent and you some nice sound work here with all that you have done here I like the idea here of what you are doing with the demo reel, and "YOU-SHOULD-MAKE-MORE" of these and present more sound work.
~~SUGGESTED IDEAS~~
make it longer with more accents and voices
~X~