in the first sig, you can barely tell theres a render there hiding on the right side. make sure to give your sig a focal point or else it lacks interest. Too much blending with w/e you used and its too dark. The font also doesnt really fit in with the sig. Seems like you just smacked it there.
The second sig has no redner....i think...seems like you just used a splatter burhs and a c4d and mixed them together with text. not a good combination imo.
i think this is your best sig, the font and position of the text doesnt really fit but its the best one i see. The smudging is pretty good but you need to include more in the sig, not just smudging. the border looks pretty messed up too for some reason...
Well thats my 2 cents
keep practicing
gj