Below are a few images of different Hand styles and tags I've seen when out and about. Tagging is nicknamed "bombing" its a quick movement in the essence of the moment, like quickly writing your signature.
Kobe has a very different hand style to the style of letters in his pieces, I like his K and his O they fit together perfectly.
The image above is a really good example of the character created by the different ways people write, usually tagging is seen as being scribbles on a wall with no structure or motive. In the image above the 5 repeated tags show how each letter has been planned out and arranged to appear in a certain way.