Great sigs - I love the vertical one - the text at the bottom looks great - it looks like a clipping mask to me. ^^ I also like the Naruto sig - the concept is nice, and I like the minimal color usage. The "dying slowly" sig is my favorite - the colors are very nice, and I like the lighting. The House sig is a little hectic, and the light source is kind of covering his face, perhaps a little too much. I like the text though! Overall, awesome sigs.