Great
You have a very wide range of voices plus the sound quality itself is outstanding.
Too bad we can't see the flashes the quotes belong to. Some sounded pretty familiar, others didn't.
I think the best way to promote your voice acting skills would be to write a short conversation or a short scene between various characters, all voiced by yourself (or maybe one or two voices from other voice actors).
This would give you the chance to show off your skills and the listener had something nice (and hopefully funny) to listen to.