I live in Fairfield County, Connecticut, and thus would hope that our little wealthy county could stay part of the US. But I'd be willing to give up the rest of New England. We'd lose a bunch of Democratic Senators: 1 from VT, 2 from MA, 1 from RI, 2 from CT, and Jeffords. We'd lose a few Republicans: 2 from NH, 2 from ME and 1 from RI. So the Senate would be, after this, 44 Democrats and 44 Republicans, with Cheney breaking the tie. And there'd be no more idiot Republican Senator from RI threatening to switch sides.
We'd also gain politically if we got western Canada. Ontario could be its own country, Quebec could be independent and poor, and the Maritimes could be a third world country.
If you like barbecue, we'll let you be part of Texas. ;-)