Thanks for your input.
I wanted to make sure there weren't any standards for signatures that I was in breach of.
I wanted the signature to be highly visible, since I want to proclaim the fact that I am a fan, so that I wouldn't be tempted to make off-topic posts, etc, which is something I have a problem with on many sites.
I noticed that when I hold Ctrl and rotate the mouse wheel, the size of the webpage decreases, but my signature stays the same size. Weird.