Sabre's sprite looks kinda weird. He looks kinda stiff/tense. Comparing him to the others's sprites I noticed that Sabre's head is lower and it's near the same line as the shoulders. Moving his head higher than it is right now would make him a bit more relaxed (and handsome to look at). And the chest looks weird too, the breast line isn't visible and it just looks odd (or it's just that the abs n stuff are too low, hard to tell).
Sorry if this sounds mean, but it just frustrates me that the sprite doesn't do justice for the art. I very much enjoy everything else.