I rather like the Twanalysis website!

Basically, they scan your twitter account and make a few sweeping judgements based on your tweeting habits etc.

The results based on my account can be accessed below:

http://twanalyst.com/DarkAeon/

I especially liked:

Tips for your tweeting…

Your tweeting is already tip-top! No improvements needed – but check back here every so often to make sure your reputation is being maintained!

Hurrah!

So if that fills you with intrigue, feel free to follow me on twitter; http://twitter.com/DarkAeon