a great color would definitely boost the overall looks of the tag
perhaps a shade of dark green maybe. color balance/gradient maps.

very promising tag. just work with the depth and lighting and its ace.
some more color would be nice too.

ive seen the other versions of this and i love it

very hard to work with an already contrasted character.
might as well make a vector tag with this ya know.

u can create some awesome unique effects with this stock/render
mess with the colors a bit more and perhaps do some changing to her face
or her mouth cover. just experiment.

i like this sig. a bit high in contrast and monotoned but its good.

unique. make something in that hallway perhaps? maybe some realistic 3d text? or a blast/explosion from that window. o.o color explosion yea.
=D.