i have noticed when i do a sig that is alot easier to make them whe the render isnt holding a sword or sumthin above his head and body. it makes it really hard to fit in the sig and to me messes up the overall flow. i useually go to Planetrender.com and look throught them and pick a nice color scheme then go from there. you can also find some good c4d's but u are getting a ton better and i really like your requests that you have been filling
i like what ur doing but i think it needs to be laid out differently. also remember when ur choose a c4d for ur sig it doesnt really matter what color it is to begin with you can always change the color to what you need. it mostly depends on the shape.