OO thats nice ^__^ Pixel stretch looks good and has a nice colour, and the subtle brushing on the top is cool. Not too fond of that text bevel and emboss though ... 7/10 ^^
your sig both look good only the bg of the 1st one is just an image 7/10 for the 1st but if you made that then 8/10 and 8/10 for the 2nd
xmen one is cool, not too plain, but i could add a little more to it 8.5/10 TITTAYS, love it looks cool, lighting is awesome, everything is cool, but i would put the text in the corner or sumthing
mmm... the feel is a little too dense imo, cause of big patches of solid dark colors which coincides with the render. text could use more work too. otherwise, it's not bad. 7/10