Trying to Improve

[And1Banners]

I've been making sigs on and off now for a few years but never took much advice. 
What do you guys think I need to improve on? All criticism is wanted!
 

 

 

 

 

 

 
Thanks for the guidance guys!

 

[bosoxlover12]

First and last ones have potential


There just isn't much going on in these. They need more textures added to them, and a little less contrasted lighting to them