in all of them the renders are too big and take up most of the tags. The scanlines on the DMC tag dont work nor does the border around it, work on the effects,lighting and text on them m8.
The flow is pretty nice with all those C4D renders, but do not overdo it, sometimes your sigs really look overbrightened / oversharpened.
Make the renders smaller in them =P. Try and get a flow into the signature without so much random stuff. As for the text, it needs work, can't give much advice on that though . Try using some filters and gradients to fix coloring and depth. Keep working at it.