This is great, I specially like the clothes (all of them, but Sam's red shirt is ), the composition of the group is awesome too, everyone with their own gun, Sam's is his hand! and Castiel has a SWORD!
You made Genivive((w/e i dont care how to spell it)) attractive. And that? = very hard to do. This is great for a t-shirt design! Wait, did somebody already say that? (checks) Yup. but that just means you should do it. Like with cafepress or something. I'd pay money for it. And a lot of other people would too. Like I said before, I wouldn't mind your drawing of Ruby over my chest. this was really long. I'm sorry. T3T
You might say they're ridiculous, but seriously, those are some seriously awesome cool dramatic poses! I especially like the guy on the far right; his expression is really well done and captures a lot of subtle emotion even with the 'neutral' sort of face he's making.
With all of them, their poses are very well drawn and natural; they don't look stiff or forced, and I like that in it. The poses also have a lot of personality, and even though I don't know the characters, it gives a good body language impression of what they're probably like-- each one gives off a different sort of impression and individual mood. That sort of attention to detail is something I really admire. ^^
The colouring suits the style, and the colours go together well, being complementary and subdued without losing any interest or impact. The shading is really good; the folds of the jeans and pattern of the red shirt are especially cool.
You have an awesome style and a lot of skill. Great work!~