Linkin Park-Manip:




...und 2 icon's:

Manip:It's look very nice and the effect are good but i don't like this font good job

Icon's:I like this 2 icon's but i don't like the font KIU

sig - i prefer v2. nice colors, maybe adjust the contrasts a bit though good use of textures, good blending overall and nice effects! bg goes very well with the render (or is it a stock?)
ava 1 - nice effects, good colors but it needs contrast and lighting work. and the text could be better!
ava 2 - colors are ok but it is too dark, and the textures doesn't work very well in this one.. text is better than in the first, but still needs some work