I have reached a hundred posts! Although I realize that I have achieved absolutely nothing, I feel that my current signature is getting old. Any suggestions?

Well, in my opinion at least, your signature should be really be something you pick yourself. You know, something you find to be particularly funny or thought-provoking.

I also don't think anyone would really mind if you just waited until something catches your eye. You don't really need one.

Don't use a signature unless you're signing it with your name and title of significance (writer for a blog, member of a band, or whatever). You should include content in your posts, don't feel like you need to add something to every post with your signature.

Find something on your own. I know you're only 15, but it's time for you to do things yourself. You could link your last.fm, a short quote from the forum that you like or some lyrics you think are deep...

Actually that current sig is way too large anyway. You need to limit it to 4 lines. But yeah, awful topic.