This one has nice potential. The bottom half reminds me of a car emblem.
Simple. Loose. Sort of figurative. Nice movement and flow.
This is a rework of one below. This time with a cube for the dot and more dimensionality.
This one is also a rework of one below. This time upright and much more attention to perspective (hence the diagonal guides).
I was particularly fond of this idea at first, now however, I am having second thoughts. Perhaps I can fiddle with it in Illustrator. I am concerned about it coming across as "jr."