ok lets not break all the gj stuff here...

lol i am joking, but ill have to bring up some bad points.
for the future, a boarder is always 1px and not more, it just kills he sig even if its perfect... so plz boarders 1px...
the first, the render is nice, needs way more blending tho, the bg i dunno wut u did, but its ok. it could use some brushes or effects or some kind. Text needs to be blended more, i mean make it something taht will match the sig, not just random text.
The second sig, use more filters on the renders for u bg, cz u can just see it too much. we can still know its the render, i mean we can still even see some details... so more filters on in and effects. boarders and text too. but for a beginner u will pick up the tricks.
good try.