Besides, is everyone else in your congressional district so mentally retarded that there is no one who could do just as good a job as the incumbent retard?
Seriously, the issue is careerism, people who go to Washington, become part of the Washingtonian class and never leave until they retire with a fat pile of boodle under their arms. Now we are starting to see the Washingtonian class become an hereditary class - see Caroline Kennedy's attempt to capture the New York Senate seat on the basis of her ancestry and Ted Kennedy's behind-the-scenes attempt to will his own senate seat to his wife. This will only get worse - and it will get worse fast.
Many things are in the Constitution to forbid the people from doing what they want and corrupting the Republic. Term limits would be one more.
Not that it will ever happen. Maybe a thousand years from now some people trying to set up a stable republic will learn from our (and the founders) mistakes, and include term limits. Note to those people if they happen to read this: term limits, and no retirement pensions to elected officials. If they want retirement security let them retire to private life and earn it themselves, like their constituents have to.
Now, and in my opinion,and the next few years is not a good time to tinker with the Constitution.