If you fancy yourself as a bit of a rocker then you might want to check out this Guitar Player Theme.
The Series 60 theme transforms your mobile phone by adding a striking background image of a guitarist working his instrument. The styling of this image reminded me a lot of the way Dire Straits were characterized in their famous Money For Nothing video. The bluey splash that appears behind the guitarist is repeated when you enter the menu system of your phone.
On the downside, Guitar Player Theme doesn't really make a great many changes to the system icons and I found that the use of orange text on the main screen renders it a little unreadable.
However, if you're into 80s power rock then Guitar Player Theme might strike a chord with you.