Of your designs, #89 is my favourite. It suggests 3D and pixelation. I also like the way the angle of the cube makes the purple 'x' on the cube match the 'x' at the end of the name. It integrates the two very nicely. But, the cube looks too much like a rubik's cube and I don't want that.
Also, I don't really like most of the colours you are using.