Not bad, man!
I like this Minushi, definately :) especially since Newgrounds is lacking in quality original series right now. The voice acting is good, not incredibly convincing or interesting, but good nonetheless. The writing is pretty good too, I can't complain too much about that. The drawings are pretty good too. Unfortunately, Minushi's got it's flaws.
For one, I can enjoy a laid back cartoon, but this series is TOO laid back. Things move at a good pace storywise, but the movements are slight and slow (What is this, 8 frames per second??) I think the style you chose to animate this with was a terrible idea for the frame rate, and frankly, the "action" parts don't get me hype at all. Also, the character designs are waaaay too lose and inconsistent for this to be animated with a layer-separated animation technique with lots of detail on the non-moving parts. At least if there was lots of frame-by-frame, the proportional inconsistencies would make it look sweeter. Also, the music completely fails to get me interested at any time, period, the action scenes and the talking scenes could have the same downbeat music you used (which I'm assuming is for the sake of saving money you would use to buy the rights for copyrighted stuff).
With
1.more frame-by-frame and less emphasis on character 'color detail' (streaks in the hair and shading)
2.better music to get people into the moment
3.a higher framerate, and MORE ACTION and frame-by-frame during "action" scenes
This would be an instant hit. But I think you finished the whole thing already though since you're selling DVDs and know it's 19 chapters to the end, so I hope this review helps you with future flash products. Sweet cartoon, man!
P.S.: Thank you so much for using a black female lead, NOBODY does that for the sista's man.