Will America ever be satisfied?

Every year, Republicans complain about how Liberal the Dem. Candidate is, and the Democrats complain about how conservative the Republican candidate is...so now that we have John McCain, the most Bi-Partisan choice in over 20 years...shouldn't he be way ahead right now? Or is it just in people's nature to find something to complain about? And don't give me any of that 90% vote with Bush crap, because anyone with a brain knows that the senate is always pressured to vote with the president.