When Sen. Chris Dodd leaves leaves office in January, the Senate is losing more than a 30-year veteran; it’s losing one of the 10 biggest egos in the institution, according to a survey of all 100 Senate offices by Slate.  The online magazine examined the public areas of the senators’ offices, tallying photos of the incumbent–particularly shots with celebrities and presidents–and trophy cases, then applying a formula to come up with an ego ranking. Dodd comes in at No. 8. But even though he’s leaving, Connecticut will still have a big head in Washington: Joe Lieberman ranks No. 4.