When you find an extremely elaborate signature, where the body of the writing is not so overdone, you have found a writer who desperately wants attention.
If the individual is in show business, it may be that they need this to further their career, or it may be that they got into show business in the first place because of the need for recognition and attention.
But no matter who the person, or what the cause, a signature that seems designed just for display is someone who is saying “notice me.”
If the writing, either in the signature or not, also has long tails on the ends of words, that swing upwards, ending above the height of the lower case letters, this is even more of a cry for attention.
Many people have these long, upward swinging final strokes and they enjoy recognition when they feel they have earned it. However when you couple it with a deliberately attention grabbing signature, you have someone who is demanding that you pay undue attention to them whether or not they have done something warranting approval.