overall, i like the new concepts you're bringing to the table.
#12 - this definitely caught my attention due to the clean lines and good color combo. the 4 is a little different - looks a little more like a "Y" than a 4 which might be a little confusing. overall, like it a lot!
#14 - i just thought this was a real attention grabber. i really like it, but i think it screams more NASA than 3D content/production. i definitely think this one has good "bones" though...
#13 - i like this for the reasons i like #12, but the 423 is very difficult to read.
#28 - cool design though i think the 3D effects look like very heavy shadowing more than 3D...is there a way to lighten that up and give it a little more pop?