Manips can be tricky sometimes, you have to watch out with what effects can and cannot work on them. For example, whatever is giving this a grey haze (looks like something set on screen maybe?) is a no go for this piece; the contrast is thrown way off. Get some curves layers in there to bring some darkness back in. Aside from that, the render is sitting a bit too high in the sig; I'd like to see his face down a bit further. The text is simple but relatively effective. Might help to get some really small text (borderline unreadable) as a way of "underlining" the main text. The face is a bit too sharp which isn't always a major issue but there isn't really a lot going on here so it does make it a bit distracting.