I'm really happy to see so much positive feedback in this thread form other users. The makes me happy to be a part of newgrounds. I say paint/draw whatever keeps you inspired, heck, it's better to draw a bad picture, or a copied picture, or any picture than it is to draw no picture at all. I say draw draw draw, no matter what. You can't get worse.
I was big into comics as a kid, and what I tried to do was make sure I drew as much boring stuff, anatomy, still life, etc, as I did comic stuff. I'd draw a teapot and study the light, shadow, etc, and then reward myself by drawing some dude getting his head ripped off by a giant robot mantis.
I'm slowly coming to the conclusion it isn't so much WHAT you draw, but how you draw it. When you draw or copy some anime, really look at the art that inspires you and try to 'understand' the lines. Why does this work? Why did the artist do this? Why did they use this color? ETC- Understanding is what convincing art is all about.
Great stuff, keep it up! Stay inspired!