Effort: 2/2 - I can see that you put in enough here.
Look: 2/3 - Really not a fan of this to be honest. Bright is okay but to me this is a bit overdone in that regard. Try to avoid Color Dodge, as it blows out details. I recommend downloading some .PSDs from the Resources section to see what other people are doing in sigs that you like. Other than that, I strongly encourage you to post sigs in the graphics forum for feedback from more members. In regards to this sig specifically, I think you should try to avoid using special fonts, and stick to things like Arial, or grab Roboto from online. Keep the text simple, and a bit smaller. Also have the text right above your render in the layers, that way the stocks will blend in the text as well.
Creativity: 1/1 - You've got nice style.
Total: 5/6