Lots of sigs, first ones on the forums I think

[Proflax]

I know sigs arent my strongest part though ^^

[MarkPancake]

Effects aren't bad. I think you need to work on compo and lighting more. Your render choices seem bad too, find a good stockbucket to use as your currents are either LQ or don't fit imo. Also try get a nice mood to the piece, some of them have strange atmo or none at all.

[Scrib]

Ermm*cough*tut on the killzone one *cough* thats the best one all others as splint said need to be improved, they aren't bad though.

[Proflax]

hm, they all have HQ renders except the first one. Most of them are renders from a wallpaper. :\

The killzone one is just smudging Use unique brushes made by urself, helps alot.

I wont be using these styles I think for my sigs, although I like the master chief one myself

[BonesMa]

Great stuff my fav is the tomb raider one.