the hendrix one is nice, good color. maybe change it to make the render more of the point, and not the effects? 8.9/10 i can now see why its your fav ahha.. i give the chick on a 9/10 THE G FORCE ONE HAS NICE CONTRAST IN COLORS but maybe alittle plain. nice simple text. 8/10 (sorry caps)
nice sig, though some parts, especially the render, seems to be brushed over with some textures, and that doesnt look too good imo. 5.5/10
9/10 - Nice mixing of shadows, lights and colors. Everything suits. 6/10 - Lights are bad here and it looks chaotic and monotone. Still good though.