Giants, no question. First and foremost, they are the NL team. I will root for any NL team in the WS except the Phillies, since the AL doesn't play real baseball. Second, how can you not root for a team of losers and castoffs like the Giants. A team where Cody freaking Ross, a placed on waivers pickup from the Marlins of all teams, is NLCS MVP. A team where you have a long haired pothead as the pitching ace?
And finally, because the Rangers still and always will be Short's PoS franchise that's the reason I and so many others grew up without baseball. Just because he's dead and gone, its still the same franchise that killed so many hearts in 1971.