Not a fan of the typo in all of them. Bevelled and transparent text (and both) are all gross effects to use when doing typography. You also have like 3 different fonts in each sig. Try to stick to one ;) Its especially bad in the first one (dont use that font). In most of them, except the first one, the characters are being drowned out by the background. Don't make it look like the character is just slapped onto the background, but dont forget that the character is the main focus of the signature. Find a balance between those.