Let me first say that I really like the overall effect of this piece, but upon closer inspection I find quite a few things upon which you could improve.

The first thing that bothers me is the shading. It's rough; not very well blended. I know it's difficult getting the right shading, but it can be done. Your light source isn't immediately apparent, and it makes it a bit confusing. Also, instead of adding only darker shades, try adding some subtle lighters as well.

Also, it seems your hand was a bit shaky while drawing the design as well as the lineart.My advice is to pick a route in your head and just do it; try to just go in one swift flick of the wrist.

Now, as for the anatomy. The first problem I see is in the tail. It looks a bit awkward; like it comes out too far and stays the same width for too long.

Also, the ears look a bit akward and...poofy, I guess is my word. They don't look as "attached" as they should.

And, to put if bluntly, she has no ass The spine of a canine is a bit more level than that, with a slight curve between the front and back legs.

Also, her paws seem to be just a tad small, and they're not all the same size.

And, I'm not sure about the background colour choice... I don't think it complements the colour scheme well.

Finally, I think the outline of the wings is just a bit too thick.

Otherwise, you've got a nice start. It's a ittle rough around the edges, but it's totally fixable if you still have the .psd. I think some sparkles on the wings would be nice.

Keep at it, though!

Definitely don't worry about changing her style, seriously, I would love you to draw her in as much 'your style' as you can.

Anatomy critique, eh? I can do that.

Her body seems to be a little thin towards the back, when it should be just a tad bit wider (imagine if she was anthro, that would be where her bum would be, and where there'd be more curve) Also, there should be more "butt" (for lackof a better term) underneath the tail, instead of it curving inward and then outward down at the next joint in her leg.

The forehead seems maybe a -little- too long, and the muzzle might be a bit too rounded. You could try making the change in width of the tail less severe too.

I really think you nailed the ears and her markings, and I love the stylized look of her wings. I'll look forward to seeing more picture of her in the future~