youre doing a nice job...few suggestions...even out the shading a little bit...maybe ask someone to stand in the position in the sunlight, and study how the light reflects off the clothes...bg could use some smoothing, but i betcha knew that ;p keep up the good work...practice makes perfect!

it could just be a fat pikachu

well the lineart is ok, but the coloring does no justice to the piece. The grass is alright, but everything else, especially the textured brush crap with seemingly random colors around the edge seems poorly thought out. You may try just a solid white or offwhite, or continue the grass and sky to the rest of the piece.

On the dog, the main problem is all those white bits. I would suggest start by coloring on a layer between the background and the lineart, and use a solid brush to completely fill in the character (not the fill tool!), then use a darker or lighter brush and add shadows/highlights to give it depth.

Last of all, as I've mentioned before, the copyright notice is really tacky. Personally I'd leave it out altogether until you're actually good enough that someone might want to rip you off. Anything you draw is automatically copyrighted whether you put that stupid little notice or not. If someone wanted to use it without your permission they could easily erase that copyright message anyway.
If you actually want to include, I suggest making it a lot less obvious (the copyright notice has a bigger presense than the drawing itself!). You could use a thin brush and write it very small, or simply use the text tool and put it in the corner of the picture out of the way and not distracting.

that copyright notice is really tacky...

try adding some more shading/highlights and a bg?

I like the concept. But I do think its kinda lopsided, like it was chasing parked cars. But as I said, I like the concept n.n Oh, and the yes, I like how you blurred the black in! *takes notes*

I rather like it, I'm part Cherokee, and it seems to be the only religion I can sort of follow and not question to hell! Ehh-heh...I'm Agnostic...but yeah I like the girl a lot she's great, although I think it'd be all the more cooler if you'd bring her into more focus (less blurred color), and then make the wolf's outline just a tad darker, and perhaps whipsier, like it's about to blow away in the wind you know? And also, please try to fix it's face, it looks more like a fox, because of the large tail, and ears, and rather tiny nose...so yeah, if you need it I can get you a shit-load of wolf pictures for referance...Wolf is my mother's Totem, so our computer and house are both FILLED with wolf pictures ehh-heh...good luck! And you don't have to listen to me...but you CAN! ^__^

Not bad,..... But why is this rated extreme?