Wrath The Furious

With these, I'm not trying to be discouraging nor would I ever say anything hurtful about someone's art on purpose.
And also, I only like to go point by point on the ratings for the purpose of explaining why I put them. I usually focus on different things to begin with.

Vision- Now, "vision" doesn't completely specify what exactly it's supposed to mean in a critique, but I take it to mean is what the artist sees in their mind and how well it communicates from the artist to the audience in their art. And as such, to communicate the sin of "WRATH", this drawing of Sasuke is very clear in your vision. As such, I would give its vision 3 and a half stars.

Originality- Being an anime fanartist myself, I think anyone would agree that a picture of quite possibly ONE OF the most popular anime characters in the world isn't something that can be considered unique and it would be extremely difficult to draw any anime character in a way that could be considered original. As such, the rating of 1 star is mostly for what the drawing itself is, not how well it was or wasn't drawn. So although it is required, I don't usually like to talk about how creative someone's art is to begin with. Draw what you like to, and as long as you get better at drawing it, who cares if it's something that's been thought of before?

Technique- This piece has a very 'sketchy' style to it that I've always loved. Much like many mangas, it uses cross-hatch shading, 'blackening' as I call it, and thin inked outlines, which is perfect for this type of theme, not to mention the lightning. And you used this style for all of the picture except for the sword, which is a nice touch. The shading on the sword is smooth and well blended.<img src="e.deviantart.net/emoticons/a/a…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="349" title="Aww"/>
As such, I really think the technique would be around 3 stars, because whereas it's common to certain manga, there are still a lot of people who can't quite pull off the style and technique. It's either too messy to make out clearly or it's too clean, which wouldn't portray the mood quite as vividly.

Impact- Similar to originality, the impact of this picture may not completely stand out at first. But that's mostly because of the material itself, not how well it's done. Things that make the biggest impact are either really shocking or very bright, colorful, and cheerful. And this isn't meant to be either one, really. It's supposed to depict bitterness, spite, hate, and have an almost wicked, ominous feel to it. That sort of thing in a non-moving 2D picture doesn't create impact typically, no matter how powerful a mood it may carry.
As such, something like this would naturally have a lower initial impact until observed a bit closer of around 2 and a half stars, no matter how wonderfully drawn it is.<img src="e.deviantart.net/emoticons/a/a…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="349" title="Aww"/>


Now, as for any other thoughts;
As I look, the proportions are very nicely done, especially in the arms and back. Although honestly, with characters who wear such baggy clothing, like Sasuke, I know for a fact that it's quite difficult to tell the proportion of several areas. For instance, I can't tell for sure, but it looks as though the head might be slightly smaller than it should be.
That mentioned, I do really like how you went about shading the face. And as I said, the shading technique as a whole is very much admired on my part.
The sword and its sheathe, though, although well drawn, I would suggest that they have been a bit longer. This might be a personal preference, but had the sword and sheathe extended a bit more, maybe even having the tip go off of the paper, I think it would have added to the dramatic feeling of the drawing, as Sasuke's grass-blade is usually depicted as being rather long, possibly even a bit more than the traditional katana, I'd guess.
The Uchiha crest, as you mentioned, could have been a bit bigger, as it is a big part of Sasuke's character.
His rope belt isn't perfect, but it has a style about it that I like.

Other than those things, there's really only one other thing I'd like to mention, and this is really one of the few things I would say in terms of improvement.-
The lower garment, which resembles a sweater tied around his waist. I think that it's a bit too close to his figure. The way he's usually drawn, although it does taper near the bottom and it doesn't frill out like a skirt, it is elevated a little ways from the waist itself. It looks like it's made of a thicker material, in other words. And although you gave it enough volume and proper proportion to avoid this, a lot of people that try to draw his lower garments properly end up giving him a cone-shaped figure with skinny legs and a large upper body. So put simply, I think that you got the proportion of the lower body, but the skirt-like thing he wears around his waist could've had a bit more more shape, curve, and volume, giving his back, waist, and hips a strange kind of a "B" shape to it for his figure.

So, overall, I really like this piece and how it's drawn. And I look forward to more of your work in the future, Tsuki.<img src="e.deviantart.net/emoticons/a/a…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="349" title="Aww"/>