Desk caddies don't have to be dull. They can reflect your interests. If those interests happen to be say, the organizers you can choose from:
*paperweight. The team name or mascot is usually represented with a small plaque above the date.
*helmets are a dead give away.
*paper, this kind of caddy may be messy when it comes to holding pens and the like. Not the most adult choice, but it makes a masculine statement.
*plastic or tin. They are much simpler, and they make do with a simple logo. Most are divided to better hold office supplies. They tend to blend in at the office.