I don't have to change my signature. There is no rule about what a signature should or shouldn't be, besides I like my signature, it is me. I plan on using it until I am a guru, then I will change it.
Suit yourself, but originality is a virtue. I personally like to use signatures that get you thinking. Outer limits allways seems to have that, though they say them too fast for me to get them down correctly. so I just have to wing it.