Over the whole game? Liberty I can see, especially if you want to get to Steel quickly for Samurai or something, but the Honor finisher is going to do more to help you out if you spend the game warmongering than any other policy in any of the starting four trees. Tradition gets you a great start and a sweet capital, but it doesn't do anything for the rest of the cities you're going to acquire if you're shooting for a domination victory. I know people think great starts win games (look how many said the Shoshone were overpowered, but all they really get is a great start!) and they help, but over the long game, Tradition becomes less useful if you get lots of cities and spend your time building units instead of, say, wonders, and focusing on production instead of growth. Maybe it's to do with the fact that a lot of people start more games than they finish?