I loved this. Thought it was awesome. Have always wanted to see a Megaman Zero animation that was at least half decent. I'd say you blew it out of the water.
You speak of passion for animating. I'd say you have a lot of it. Don't lose that. I really like your work. Honestly I think you could make a series out of this and I'd support the crap out of it. Huge fan of the Megaman Zero games.
One thing that kind of killed it for me though is Zero's voice sounded like it was far away. Didn't quite fit right.
Next one I want to see Zero vs Harpuia!