Not bad. I r start here, text r bad, the brushes are ok but a little blury maybe sharpen them up a bit, fix the colors a bit and maybe place the brushes a little different next time so they dont overlay each other to much.
^ same, on most vector pieces the brushes dont overlay each other they just have a constant flow it makes it look better, kill off white circles? "It's science"
I meant it supposed to overlay eachother and be blurred. And just cause you criticesd them doesn't make them bad. I could critise loads of things about your current signatures but that wouldn't make them bad.